I have been working on an Access Database where the user can click a button and the code will access the "webcam" present on the computer and then proceed to take a picture. The code works fine on regular laptops but I tried running it on a Laptop/Tablet hybrid (Latitude 5290 2-in-1 Laptop) and for whatever reason, the code does not access the camera at all.
I downloaded a third party app called Dorgem and tried to access the camera but got an error saying "Failed to connect to device." To me, it sounds like a permission issue but I made sure that camera permission is enabled in settings (https://www.tenforums.com/tutorials/71414-allow-deny-os-apps-access-camera-windows-10-a.html). I strongly believe that it is still a permission issue but I cannot find a way around it. I would really appreciate if I can get some input on how to solve this issue.
Here is the code I have been using in access.
Option Compare Database
Option Explicit
Public ImageLocation As String
Public AttachmentIndicator As String
Const WS_CHILD As Long = &H40000000
Const WS_VISIBLE As Long = &H10000000
Const WM_USER As Long = &H400
Const WM_CAP_START As Long = WM_USER
Const WM_CAP_DRIVER_CONNECT As Long = WM_CAP_START + 10
Const WM_CAP_DRIVER_DISCONNECT As Long = WM_CAP_START + 11
Const WM_CAP_SET_PREVIEW As Long = WM_CAP_START + 50
Const WM_CAP_SET_PREVIEWRATE As Long = WM_CAP_START + 52
Const WM_CAP_DLG_VIDEOFORMAT As Long = WM_CAP_START + 41
Const WM_CAP_FILE_SAVEDIB As Long = WM_CAP_START + 25
Private Declare PtrSafe Function capCreateCaptureWindow _
Lib "avicap32.dll" Alias "capCreateCaptureWindowA" _
(ByVal lpszWindowName As String, ByVal dwStyle As Long _
, ByVal X As Long, ByVal Y As Long, ByVal nWidth As Long _
, ByVal nHeight As Long, ByVal hwndParent As LongPtr _
, ByVal nID As Long) As Long
Private Declare PtrSafe Function SendMessage Lib "user32" _
Alias "SendMessageA" (ByVal hWnd As LongPtr, ByVal wMsg As Long _
, ByVal wParam As Long, ByRef lParam As Any) As Long
Dim hCap As LongPtr
Private Sub TakePictureButton_Click()
Dim sFileName As String
Call SendMessage(hCap, WM_CAP_SET_PREVIEW, CLng(False), 0&)
sFileName = "C:\Users\212764307\Documents\" & Forms!IRForm.IRNO & ".jpg"
ImageLocation = sFileName
Call SendMessage(hCap, WM_CAP_FILE_SAVEDIB, 0&, ByVal CStr(sFileName))
DoFinally:
Call SendMessage(hCap, WM_CAP_SET_PREVIEW, CLng(True), 0&)
End Sub
Private Sub Cmd3_Click()
Dim Temp As Long
Temp = SendMessage(hCap, WM_CAP_DRIVER_DISCONNECT, 0&, 0&)
DoCmd.Close
End Sub
Private Sub StartCameraButton_Click()
hCap = capCreateCaptureWindow("Take a Camera Shot", WS_CHILD Or WS_VISIBLE, 0, 0, PicWebCam.Width, PicWebCam.Height, PicWebCam.Form.hWnd, 0)
If hCap <> 0 Then
Call SendMessage(hCap, WM_CAP_DRIVER_CONNECT, 0, 0)
Call SendMessage(hCap, WM_CAP_SET_PREVIEWRATE, 66, 0&)
Call SendMessage(hCap, WM_CAP_SET_PREVIEW, CLng(True), 0&)
End If
End Sub
Private Sub Cmd2_Click()
Dim Temp As Long
Temp = SendMessage(hCap, WM_CAP_DLG_VIDEOFORMAT, 0&, 0&)
End Sub
Private Sub Form_Load()
StartCameraButton.Caption = "Start Camera"
cmd2.Caption = "&Format Cam"`enter code here`
cmd3.Caption = "&Close Cam"
TakePictureButton.Caption = "&Take Picture"
End Sub'
Use newest version of avicap32.dll (copy to windows\system32 and windows\sysWOW64 directories,also check camera drivers, there is always problem on them with avicap.
Related
I am building VB6.0 application , where is user swipes the card and form will kind of pops out with a Thank you message. Rest all are working fine , only thing is the form gets minimized, rather it should pop out.
I googled theirs Form.Activate but when I write it gives error.
Compile Error : Method or data member not found
I am new to VB so please excuse if any naive mistake.
Code:
Me.Hide
Form2.Show
Form2.Activate
I need Form2 to Pop out.
Thanks
I am able to achieve by
Private Sub Form_Load()
Dim lR As Long
lR = SetTopMostWindow(Form2.hwnd, True)
End Sub
and added a module
Option Explicit
Public Const SWP_NOMOVE = 2
Public Const SWP_NOSIZE = 1
Public Const FLAGS = SWP_NOMOVE Or SWP_NOSIZE
Public Const HWND_TOPMOST = -1
Public Const HWND_NOTOPMOST = -2
Declare Function SetWindowPos Lib "user32" _
(ByVal hwnd As Long, _
ByVal hWndInsertAfter As Long, _
ByVal x As Long, _
ByVal y As Long, _
ByVal cx As Long, _
ByVal cy As Long, _
ByVal wFlags As Long) As Long
Public Function SetTopMostWindow(hwnd As Long, Topmost As Boolean) _
As Long
If Topmost = True Then 'Make the window topmost
SetTopMostWindow = SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, _
0, FLAGS)
Else
SetTopMostWindow = SetWindowPos(hwnd, HWND_NOTOPMOST, 0, 0, _
0, 0, FLAGS)
SetTopMostWindow = False
End If
End Function</pre>
One can refer to https://support.microsoft.com/en-us/kb/184297
Thanks
I'm trying to retrieve the text from an EDIT control using GetWindowText and GetWindowTextLength. The application retrieves the text from the window under the cursor and it works on all windows with a caption or text with the exception of the EDIT control. The EDIT control is the result window on the Windows XP Calculator, calc.exe.
Dim S As String
Dim L As Long
L = GetWindowTextLength(handle) + 1
Receiving string = GetWindowText(handle, S, L)
EDIT:
According to SPY++ the Edit class control does not receive the EM_GETSELTEXT or the WM_GETTEXT message.The code below retrieves the text from the Edit class control on the Windows XP calc.exe calculator every time that I press a button on my UI. It is not the method that I would have preferred to use, however, it accomplishes my task.
Const EM_SETSEL = &HB1
Const ES_READONLY = &H800
Const WM_COPY = &H301
Const EM_GETSELTEXT = &H43E
Const WM_GETTEXTLENGTH = &HE
Const WM_SETFOCUS As Long = &H7
Dim L As Long
L = SendMessage(EditHwnd, WM_GETTEXTLENGTH, 0&, 0)
SendMessage EditHwnd, WM_SETFOCUS, 0&, 0
SendMessage EditHwnd, EM_SETSEL, 0&, L
SendMessage EditHwnd, ES_READONLY, 0&, 0 ' read only = false
Clipboard.Clear
SendMessage EditHwnd, WM_COPY, 0&, 0
SendMessage EditHwnd, ES_READONLY, 1&, 0 ' read only = true
Receiving string = Clipboard.GetText
Clipboard.Clear
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" (ByVal hwnd As Long) As Long
Private Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Function GetText(handle As Long) As String
Dim S As String, L As Integer, cch As Long
L = GetWindowTextLength(handle) + 1
S = String(L, 0)
GetText = Mid(S, 1, GetWindowText(handle, S, L))
End Function
Private Sub Form_Load()
Dim hw As Long
hw = Me.hwnd
MsgBox GetText(hw)
End Sub
But it will not work with controls like EDIT, as it is written in help. ;( In order to get the text of the child window (control), try to get a list of all windows using API EnumWindows/EnumThreadWindows/GetWindowThreadProcessId, to find the desired control.
What is the name of the class to EDIT You need? What is its width and height? I could write code specifically for the search for this control.
this code works fine in Windows XP (virtual machine)
Private Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" _
(ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function FindWindowEx Lib "user32.dll" Alias "FindWindowExA" _
(ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As Any, ByVal lpsz2 As Any) As Long
Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" _
(ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByRef lParam As Any) As Long
Private Declare Function AttachThreadInput Lib "user32.dll" _
(ByVal idAttach As Long, ByVal idAttachTo As Long, ByVal fAttach As Long) As Long
Private Const WM_GETTEXT As Long = &HD&
Private Const WM_GETTEXTLENGTH As Long = &HE&
Function WindowText(ByVal hWnd As Long) As String
Dim ret As Long
ret = SendMessage(hWnd, WM_GETTEXTLENGTH, 0, ByVal 0&)
WindowText = String(ret, 0)
ret = SendMessage(hWnd, WM_GETTEXT, ret + 1, ByVal WindowText)
End Function
Private Sub Command1_Click()
Dim hCalc As Long, hEdit As Long
hCalc = FindWindow("SciCalc", vbNullString)
hEdit = FindWindowEx(hCalc, 0&, "Edit", vbNullString)
MsgBox WindowText(hEdit)
End Sub
I am working on an application that deletes registry subkeys, but I can't seem to find a solution for that problem... I know it is easier to do this with VB.NET but I want to know how to get this done using VB6
What I have tried...
DeleteRegKey HKEY_CURRENT_USER\Software\Test.
Take this for what it's worth. I haven't used this in a few years so it has not been tested on Windows 8, and I'm not at all sure about Windows 7 either. I pulled this from a utility class so hopefully I got all the declarations.
Private Const KEY_NOTIFY = &H10
Private Const KEY_QUERY_VALUE = &H1
Private Const KEY_CREATE_LINK = &H20
Private Const KEY_CREATE_SUB_KEY = &H4
Private Const KEY_ENUMERATE_SUB_KEYS = &H8
Private Const KEY_EVENT = &H1
Private Const KEY_SET_VALUE = &H2
Private Const KEY_ALL_ACCESS = ((STANDARD_RIGHTS_ALL Or KEY_QUERY_VALUE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY Or KEY_CREATE_LINK) And (Not SYNCHRONIZE))
Private Const KEY_READ = ((STANDARD_RIGHTS_READ Or KEY_QUERY_VALUE Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY) And (Not SYNCHRONIZE))
Private Const KEY_EXECUTE = ((KEY_READ) And (Not SYNCHRONIZE))
Private Const KEY_WRITE = ((STANDARD_RIGHTS_WRITE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY) And (Not SYNCHRONIZE))
Public Enum RegRootKey
HKEY_CLASSES_ROOT = &H80000000
HKEY_CURRENT_CONFIG = &H80000005
HKEY_CURRENT_USER = &H80000001
HKEY_DYN_DATA = &H80000006
HKEY_LOCAL_MACHINE = &H80000002
HKEY_PERFORMANCE_DATA = &H80000004
HKEY_USERS = &H80000003
End Enum
Private Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Private Declare Function RegCreateKeyEx Lib "advapi32.dll" Alias "RegCreateKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal Reserved As Long, ByVal lpClass As String, ByVal dwOptions As Long, ByVal samDesired As Long, ByVal lpSecurityAttributes As Long, phkResult As Long, lpdwDisposition As Long) As Long
Private Declare Function RegDeleteKey Lib "advapi32.dll" Alias "RegDeleteKeyA" (ByVal hKey As Long, ByVal lpSubKey As String) As Long
Private Declare Function RegEnumKeyEx Lib "advapi32.dll" Alias "RegEnumKeyExA" (ByVal hKey As Long, ByVal dwIndex As Long, ByVal lpName As String, lpcbName As Long, ByVal lpReserved As Long, ByVal lpClass As String, lpcbClass As Long, lpftLastWriteTime As FILETIME) As Long
Public Function DeleteRegKey(ByVal hKeyRoot As RegRootKey, ByVal hKeySubKey As String, ByVal KeyName As String) As Boolean
Dim lngRst As Long
Dim hKeyReturn As Long
Dim hKeyDisposition As Long
Dim strSubKeys() As String
Dim lngSubKeyCount As Long
Dim i As Long
On Error GoTo errDeleteRegKey
lngRst = RegOpenKeyEx(hKeyRoot, hKeySubKey, ByVal 0&, KEY_READ + KEY_WRITE, hKeyReturn)
If lngRst = 0 Then 'we can continue
' first need to find and delete sub keys
lngSubKeyCount = EnumSubKeys(hKeyRoot, hKeySubKey & "\" & KeyName, strSubKeys)
' recursively call this function to delete all sub keys
For i = 0 To lngSubKeyCount - 1
Call DeleteRegKey(hKeyRoot, hKeySubKey & "\" & KeyName, strSubKeys(i))
Next i
' finally down (up?) to the parent key
lngRst = RegDeleteKey(hKeyReturn, ByVal KeyName)
'close the handle
If hKeyReturn <> 0 Then
lngRst = RegCloseKey(hKeyReturn)
hKeyReturn = 0
End If
End If
If lngRst = 0 Then '0 = success
DeleteRegKey = True
Else
Err.Raise lngRst, App.EXEName, FormatClassError(lngRst)
End If
Exit Function
errDeleteRegKey:
'close the handle
If hKeyReturn <> 0 Then
lngRst = RegCloseKey(hKeyReturn)
hKeyReturn = 0
End If
Err.Raise Err.Number, Err.Source & ":DeleteRegKey", Err.Description
End Function
Add this function to a form, module, or class then
Call DeleteRegKey(HKEY_CURRENT_USER, "Software", "Test")
' or
DeleteRegKey HKEY_CURRENT_USER, "Software", "Test"
' or
Dim blnRst as Boolean
blnRst = DeleteRegKey(HKEY_CURRENT_USER, "Software", "Test")
I've found a way to get hdd serial no in vb6. But it needs to select an option from
primary master
primary slave
secondary master
secondary slave
But I want to auto select an option. The auto select logic is,
suppose I've 4 HDD with the above 4 types. And the logic will select the hdd type, on which the current system is loaded.
I really have no idea how to detect the current system is on which HDD type. Please help.
Here is the class that I use to select HDD serial no. HDSN CLASS
The code below should help:
Option Explicit
Private Const FILE_SHARE_READ = &H1
Private Const FILE_SHARE_WRITE = &H2
Private Const GENERIC_READ = &H80000000
Private Const GENERIC_WRITE = &H40000000
Private Const OPEN_EXISTING = 3
Private Const IOCTL_VOLUME_BASE As Long = 86 ' Asc("V")
Private Const METHOD_BUFFERED As Long = 0
Private Const FILE_READ_ACCESS As Long = 1
Private Const FILE_ANY_ACCESS As Long = 0
'DEFINE IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS CTL_CODE(IOCTL_VOLUME_BASE, 0, METHOD_BUFFERED, FILE_ANY_ACCESS)
Private Const IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS = (((IOCTL_VOLUME_BASE) * (2& ^ 16&)) Or ((FILE_ANY_ACCESS) * (2& ^ 14&)) Or ((0&) * (2& ^ 2&)) Or (METHOD_BUFFERED))
Private Type DISK_EXTENT
DiskNumber As Long
StartingOffset As Currency
ExtentLength As Currency
End Type
Private Type VOLUME_DISK_EXTENTS
NumberOfDiskExtents As Currency
Extents(1 To 4) As DISK_EXTENT
End Type
Private Declare Function CreateFile _
Lib "kernel32" Alias "CreateFileA" _
(ByVal lpFileName As String, _
ByVal dwDesiredAccess As Long, _
ByVal dwShareMode As Long, _
ByVal lpSecurityAttributes As Long, _
ByVal dwCreationDisposition As Long, _
ByVal dwFlagsAndAttributes As Long, _
ByVal hTemplateFile As Long) As Long
Private Declare Function CloseHandle _
Lib "kernel32" _
(ByVal hObject As Long) As Long
Private Declare Function GetWindowsDirectory Lib "Kernel32.dll" Alias "GetWindowsDirectoryW" ( _
ByVal lpBuffer As Long, _
ByVal uSize As Long _
) As Long
Private Declare Function DeviceIoControlNoInput _
Lib "kernel32" Alias "DeviceIoControl" _
(ByVal hDevice As Long, _
ByVal dwIoControlCode As Long, _
ByVal lpInBuffer As Long, _
ByVal nInBufferSize As Long, _
ByRef lpOutBuffer As Any, _
ByVal nOutBufferSize As Long, _
ByRef lpBytesReturned As Long, _
ByVal lpOverlapped As Long) As Long
' Return the index of the physical drive from which we've booted into Windows.
Public Function GetBootPhysicalDrive() As Long
Dim sWindowsPath As String
Dim nRet As Long
Dim sDevicePath As String
Dim hLogicalBootDrive As Long
Dim sVolumeDevice As String
Dim uVolumeDiskExtents As VOLUME_DISK_EXTENTS
Dim nBytesReturned As Long
' Allocate space and retrieve the windows directory.
sWindowsPath = Space$(64)
nRet = GetWindowsDirectory(StrPtr(sWindowsPath), 64)
' This gives us the volume that Windows is on. Open it.
sVolumeDevice = "\\.\" & Left$(sWindowsPath, 2)
hLogicalBootDrive = CreateFile(sVolumeDevice, GENERIC_READ + GENERIC_WRITE, FILE_SHARE_READ + FILE_SHARE_WRITE, 0&, OPEN_EXISTING, 0&, 0&)
' Find out information about this volume.
nRet = DeviceIoControlNoInput(hLogicalBootDrive, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, 0&, 0&, uVolumeDiskExtents, LenB(uVolumeDiskExtents), nBytesReturned, 0&)
If nRet = 0 Then
' Something went wrong. Return error value.
GetBootPhysicalDrive = -1
Else
' This is the physical disk number.
GetBootPhysicalDrive = uVolumeDiskExtents.Extents(1).DiskNumber
End If
' Close volume.
CloseHandle hLogicalBootDrive
End Function
Using theAbove Solution of Mark Bertenshaw I wrote the following in a module and just called the GetDiskSerialNumber function to get serial of the HDD from which the current system is Booted. Here is my module code:
Option Explicit
Private Const FILE_SHARE_READ = &H1
Private Const FILE_SHARE_WRITE = &H2
Private Const GENERIC_READ = &H80000000
Private Const GENERIC_WRITE = &H40000000
Private Const OPEN_EXISTING = 3
Private Const IOCTL_VOLUME_BASE As Long = 86 ' Asc("V")
Private Const METHOD_BUFFERED As Long = 0
Private Const FILE_READ_ACCESS As Long = 1
Private Const FILE_ANY_ACCESS As Long = 0
'DEFINE IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS CTL_CODE(IOCTL_VOLUME_BASE, 0, METHOD_BUFFERED, FILE_ANY_ACCESS)
Private Const IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS = (((IOCTL_VOLUME_BASE) * (2& ^ 16&)) Or ((FILE_ANY_ACCESS) * (2& ^ 14&)) Or ((0&) * (2& ^ 2&)) Or (METHOD_BUFFERED))
Private Type DISK_EXTENT
DiskNumber As Long
StartingOffset As Currency
ExtentLength As Currency
End Type
Private Type VOLUME_DISK_EXTENTS
NumberOfDiskExtents As Currency
Extents(1 To 4) As DISK_EXTENT
End Type
Private Declare Function CreateFile _
Lib "kernel32" Alias "CreateFileA" _
(ByVal lpFileName As String, _
ByVal dwDesiredAccess As Long, _
ByVal dwShareMode As Long, _
ByVal lpSecurityAttributes As Long, _
ByVal dwCreationDisposition As Long, _
ByVal dwFlagsAndAttributes As Long, _
ByVal hTemplateFile As Long) As Long
Private Declare Function CloseHandle _
Lib "kernel32" _
(ByVal hObject As Long) As Long
Private Declare Function GetWindowsDirectory Lib "Kernel32.dll" Alias "GetWindowsDirectoryW" ( _
ByVal lpBuffer As Long, _
ByVal uSize As Long _
) As Long
Private Declare Function DeviceIoControlNoInput _
Lib "kernel32" Alias "DeviceIoControl" _
(ByVal hDevice As Long, _
ByVal dwIoControlCode As Long, _
ByVal lpInBuffer As Long, _
ByVal nInBufferSize As Long, _
ByRef lpOutBuffer As Any, _
ByVal nOutBufferSize As Long, _
ByRef lpBytesReturned As Long, _
ByVal lpOverlapped As Long) As Long
' Return the index of the physical drive from which we've booted into Windows.
Public Function GetBootPhysicalDrive() As Long
Dim sWindowsPath As String
Dim nRet As Long
Dim sDevicePath As String
Dim hLogicalBootDrive As Long
Dim sVolumeDevice As String
Dim uVolumeDiskExtents As VOLUME_DISK_EXTENTS
Dim nBytesReturned As Long
' Allocate space and retrieve the windows directory.
sWindowsPath = Space$(64)
nRet = GetWindowsDirectory(StrPtr(sWindowsPath), 64)
' This gives us the volume that Windows is on. Open it.
sVolumeDevice = "\\.\" & Left$(sWindowsPath, 2)
hLogicalBootDrive = CreateFile(sVolumeDevice, GENERIC_READ + GENERIC_WRITE, FILE_SHARE_READ + FILE_SHARE_WRITE, 0&, OPEN_EXISTING, 0&, 0&)
' Find out information about this volume.
nRet = DeviceIoControlNoInput(hLogicalBootDrive, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, 0&, 0&, uVolumeDiskExtents, LenB(uVolumeDiskExtents), nBytesReturned, 0&)
If nRet = 0 Then
' Something went wrong. Return error value.
GetBootPhysicalDrive = -1
Else
' This is the physical disk number.
GetBootPhysicalDrive = uVolumeDiskExtents.Extents(1).DiskNumber
End If
' Close volume.
CloseHandle hLogicalBootDrive
End Function
Public Function GetDiskSerialNumber() As String
Dim wmiObject As Object
Dim obj As Object
Set wmiObject = GetObject("WinMgmts:")
For Each obj In wmiObject.InstancesOf("Win32_PhysicalMedia")
If obj.Tag = "\\.\PHYSICALDRIVE" + CStr(GetBootPhysicalDrive) Then GetDiskSerialNumber = obj.Tag + " : " + obj.SerialNumber
Next obj
End Function
Many thanks to Mark Bertenshaw.
I have used a code from the internet to show my webcam in a certain form, however, i dont know how to capture an image and save it automatically to my local disk drive via command button click. would anyone help me ASAP :))
here is my code for the form.
Option Explicit
Const ws_visible = &H10000000
Const ws_child = &H40000000
Const WM_USER = 1024
Const WM_CAP_EDIT_COPY = WM_USER + 30
Const wm_cap_driver_connect = WM_USER + 10
Const wm_cap_set_preview = WM_USER + 50
Const wm_cap_set_overlay = WM_USER + 51
Const WM_CAP_SET_PREVIEWRATE = WM_USER + 52
Const WM_CAP_SEQUENCE = WM_USER + 62
Const WM_CAP_SINGLE_FRAME_OPEN = WM_USER + 70
Const WM_CAP_SINGLE_FRAME_CLOSE = WM_USER + 71
Const WM_CAP_SINGLE_FRAME = WM_USER + 72
Const DRV_USER = &H4000
Const DVM_DIALOG = DRV_USER + 100
Const PREVIEWRATE = 30
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Declare Function capCreateCaptureWindow Lib "avicap32.dll" Alias "capCreateCaptureWindowA" (ByVal a As String, ByVal b As Long, ByVal c As Integer, ByVal d As Integer, ByVal e As Integer, ByVal f As Integer, ByVal g As Long, ByVal h As Integer) As Long
Dim hwndc As Long
Dim saveflag As Integer
Dim pictureindex As Integer
Dim filter1(-1 To 1, -1 To 1) As Single
Dim filter2(-1 To 1, -1 To 1) As Single
Dim temp As String
Private Sub Command2_Click()
Unload Me
Main.Show
End Sub
Private Sub Form_Load()
On Error GoTo handler:
hwndc = capCreateCaptureWindow("CaptureWindow", ws_child Or ws_visible, 0, 0, Pichwnd.Width, Pichwnd.Height, Pichwnd.hWnd, 0)
If (hwndc <> 0) Then
temp = SendMessage(hwndc, wm_cap_driver_connect, 0, 0)
temp = SendMessage(hwndc, wm_cap_set_preview, 1, 0)
temp = SendMessage(hwndc, WM_CAP_SET_PREVIEWRATE, PREVIEWRATE, 0)
temp = SendMessage(Me.hWnd, WM_CAP_EDIT_COPY, 1, 0)
Picture1.Picture = Clipboard.GetData
Else
MsgBox "Unable to capture video.", vbCritical
End If
Exit Sub
handler:
End
End Sub
Private Sub Form_Initialize()
If Me.WindowState <> vbMaximized Then
Me.WindowState = vbMaximized
Else
Me.WindowState = vbNormal
End If
End Sub
my code might be too long but i just learned some vb6 via tutorials as i need to make a GUI to my Grad project. Finally thanks for help
Send the WM_CAP_FILE_SAVEDIB message to your hwndc with the filename to save to.
A better option is to handle the video callbacks yourself with WM_CAP_SET_CALLBACK_FRAME message or the capVideoStreamCallback callback function.
Also, take a look at the examples at http://www.shrinkwrapvb.com/videocap.htm.
Note that VfW capture is very outdated and should be replaced with Directshow (but is very difficult to do properly in VB6)