Can anyone tell me how to create a ComboBox with a DropDownList (like the C# ComboBox Control with DropDownStyle = DropDownList) without resources and without MFC? I googled around 20 minutes but all codessamples I found created strange Controls for me (for example a plain area with a checkbox which cant be checked...). My code looks like this:
WNDCLASSEX wcex;
HWND hwnd;
HWND button;
HDC hDC;
HGLRC hRC;
MSG msg;
BOOL bQuit = FALSE;
float theta = 0.0f;
/* register window class */
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_OWNDC;
wcex.lpfnWndProc = WindowProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = "GLSample";
wcex.hIconSm = LoadIcon(NULL, IDI_APPLICATION);;
if (!RegisterClassEx(&wcex))
return 0;
/* create main window */
hwnd = CreateWindowEx(0,
"GLSample",
"OpenGL Sample",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,
CW_USEDEFAULT,
256,
256,
NULL,
NULL,
hInstance,
NULL);
ShowWindow(hwnd, nCmdShow);
button = CreateWindow("GLSample", "knopf", WS_CHILD | WS_VISIBLE, 200, 200, 150, 60, hwnd, NULL, hInstance, NULL);
You have to call CreateWindow() again, specifying lpClassName = combobox and dwStyle = CBS_DROPDOWNLIST.
You can edit its content by sending messages to it, using SendMessage()
Related
I'm trying to create a window with the client size the same as the display resolution (1366 x 768).
For this, I'm using AdjustWindowRectEx to get the calculated width and height of the window to be created.
The first red circle in the top right is the actual display resolution that I want the client size of the window to have.
The second red circle is the width and height that AdjustWindowRectEx calculated the window to be created with (client size + borders and title bar).
The last red circle in the bottom is the actual client size that I got after the window has been created.
The height is not what I ask Windows to give me. I asked 768 and I got 749.
Is there some limit height the window can be created with? No matter how much I ask the height to be, it never give me more than 749.
Thanks!
In CreateWindow(), WM_GETMINMAXINFO information will be sent to confirm the size of the current form can be generated, you can refer to MINMAXINFO to view its specific structure. If the size of the created form is larger than its default setting, it will be overwritten by the default size. So it will be smaller than the size you set when it is created.
According to the WM_GETMINMAXINFO:
An application can override the defaults by setting the members of MINMAXINFO, and return zero if an application processes this message.
Here is the sample:
#include <Windows.h>
LRESULT CALLBACK WndProc(HWND, UINT,WPARAM,LPARAM);
static int max_right, max_bottom;
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("hello windows");
HWND hwnd = 0;
MSG msg;
WNDCLASS wndclass;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"), szAppName, MB_ICONERROR);
}
DEVMODEW display_mode;
if (EnumDisplaySettingsW(NULL, ENUM_CURRENT_SETTINGS, &display_mode))
{
DWORD window_style = WS_CAPTION | WS_MINIMIZE | WS_SYSMENU | WS_VISIBLE;
RECT window_rect;
window_rect.right = display_mode.dmPelsWidth;
window_rect.bottom = display_mode.dmPelsHeight;
window_rect.left = window_rect.top = 0;
AdjustWindowRectEx(&window_rect, window_style, FALSE, 0);
max_right = window_rect.right - window_rect.left;
max_bottom = window_rect.bottom - window_rect.top;
HWND window_handle = CreateWindowEx(0, wndclass.lpszClassName,
TEXT("the hello program"),
window_style,
CW_USEDEFAULT, CW_USEDEFAULT,
max_right,
max_bottom,
NULL, NULL, hInstance, NULL);
ShowWindow(window_handle, iCmdShow);
UpdateWindow(window_handle);
if (window_handle)
{
RECT client_rect;
GetClientRect(window_handle, &client_rect);
}
}
while (GetMessageW(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessageW(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
RECT rect;
switch (message)
{
case WM_CREATE:
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &rect);
EndPaint(hwnd, &ps);
return 0;
case WM_GETMINMAXINFO:
((MINMAXINFO*)lParam)->ptMaxSize = { max_right,max_bottom };
((MINMAXINFO*)lParam)->ptMaxTrackSize = { max_right,max_bottom };
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
Use function GetSystemMetrics(...).
This function calculate size(resolution) of screen.
For X and Y coordinate, see my example to set variables(use in CreateWindowEx, where set a width and height of window.)Example:
int x = GetSystemMetrics(SM_CXSCREEN);
int y = GetSystemMetrics(SM_CYSCREEN);
I tried to color customize menu items (pure WinAPI). But there is a line in the menu bar which does not draw with MenuInfo.hbrBack color. If the mouse cursor hover above items a part of this line is redrawn. But if I resize the window the line will return. And in the area of menu bar where no items the line drawn constantly. How can I draw over this annoying line?
#include <windows.h>
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
struct
{
COLORREF text = RGB(200, 200, 250);
COLORREF clientBorder = RGB(120, 0, 0);
COLORREF clientBackground = RGB(100, 100, 100);
COLORREF itemBorder = RGB(0, 0, 255);
COLORREF itemBackground = RGB(0, 120, 0);
COLORREF pink = RGB(255, 0, 255);
} colorTheme;
int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpCmdLine, int nCmdShow)
{
MSG msg;
WNDCLASSEX wc;
wc.cbSize = sizeof(wc);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WndProc;
wc.lpszMenuName = NULL;
wc.lpszClassName = "MainWindow";
wc.cbWndExtra = NULL;
wc.cbClsExtra = NULL;
wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);
wc.hIconSm = LoadIcon(NULL, IDI_WINLOGO);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = CreateSolidBrush(colorTheme.clientBackground);
wc.hInstance = hInst;
RegisterClassEx(&wc);
HWND hMainWnd = CreateWindow(
"MainWindow",
"MainWindow",
WS_OVERLAPPEDWINDOW,
100, 100, 450, 120,
(HWND)NULL, NULL, HINSTANCE(hInst), NULL);
HMENU hMenu = CreateMenu();
HMENU hMenuSub1 = CreatePopupMenu();
HMENU hMenuSub2 = CreatePopupMenu();
HMENU hMenuSub3 = CreatePopupMenu();
AppendMenu(hMenu, MF_OWNERDRAW | MF_POPUP, (UINT)hMenuSub1, "SubMenu1");
AppendMenu(hMenuSub1, MF_OWNERDRAW, 0, "Item01");
AppendMenu(hMenuSub1, MF_OWNERDRAW, 0, "Item02");
AppendMenu(hMenuSub1, MF_OWNERDRAW, 0, "Item03");
AppendMenu(hMenuSub1, MF_OWNERDRAW, 0, "Item04");
AppendMenu(hMenuSub1, MF_OWNERDRAW, 0, "Item05");
AppendMenu(hMenu, MF_OWNERDRAW | MF_POPUP, (UINT)hMenuSub2, "SubMenu2");
AppendMenu(hMenu, MF_OWNERDRAW | MF_POPUP, (UINT)hMenuSub3, "SubMenu3");
MENUINFO menuInfo;
menuInfo.cbSize = sizeof(menuInfo);
menuInfo.fMask = MIM_BACKGROUND;
menuInfo.hbrBack = CreateSolidBrush(colorTheme.pink);
SetMenuInfo(hMenu, &menuInfo);
SetMenu(hMainWnd, hMenu);
ShowWindow(hMainWnd, nCmdShow);
while (GetMessage(&msg, NULL, NULL, NULL)) {
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg) {
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hDC = BeginPaint(hWnd, &ps);
HFONT hApplicationFont;
LOGFONT applicationFont;
applicationFont.lfHeight = 16;
applicationFont.lfWidth = 6;
applicationFont.lfEscapement = 0;
applicationFont.lfOrientation = 0;
applicationFont.lfWeight = FW_NORMAL;
applicationFont.lfItalic = FALSE;
applicationFont.lfUnderline = FALSE;
applicationFont.lfStrikeOut = FALSE;
applicationFont.lfCharSet = DEFAULT_CHARSET;
applicationFont.lfOutPrecision = OUT_DEFAULT_PRECIS;
applicationFont.lfClipPrecision = CLIP_DEFAULT_PRECIS;
applicationFont.lfQuality = ANTIALIASED_QUALITY;
applicationFont.lfPitchAndFamily = DEFAULT_PITCH;
strcpy_s(applicationFont.lfFaceName, "Arial");
hApplicationFont = CreateFontIndirectA(&applicationFont);
SelectObject(hDC, hApplicationFont);
SelectObject(hDC, GetStockObject(DC_PEN));
SetDCPenColor(hDC, colorTheme.clientBorder);
SelectObject(hDC, GetStockObject(DC_BRUSH));
SetDCBrushColor(hDC, colorTheme.clientBackground);
RECT clientRect;
GetClientRect(hWnd, &clientRect);
Rectangle(hDC, 0, 0, clientRect.right, clientRect.bottom);
EndPaint(hWnd, &ps);
break;
}
case WM_MEASUREITEM:
{
LPMEASUREITEMSTRUCT itemStruct = (LPMEASUREITEMSTRUCT)lParam;
const char* str = (const char*)(itemStruct->itemData);
SIZE strSize;
HDC hDC = GetDC(hWnd);
GetTextExtentPoint32(hDC, str, lstrlen(str), &strSize);
itemStruct->itemWidth = strSize.cx;
itemStruct->itemHeight = 30;
ReleaseDC(hWnd, hDC);
return TRUE;
break;
}
case WM_DRAWITEM:
{
LPDRAWITEMSTRUCT itemStruct = (LPDRAWITEMSTRUCT)lParam;
HDC hDC = itemStruct->hDC;
SelectObject(hDC, GetStockObject(DC_PEN));
SetDCPenColor(hDC, colorTheme.itemBorder);
SelectObject(hDC, GetStockObject(DC_BRUSH));
SetDCBrushColor(hDC, colorTheme.itemBackground);
SetTextColor(hDC, colorTheme.text);
SetBkMode(hDC, TRANSPARENT);
Rectangle(hDC, itemStruct->rcItem.left,
itemStruct->rcItem.top,
itemStruct->rcItem.right,
itemStruct->rcItem.bottom + 1);
DrawText(hDC, (const char*)(itemStruct->itemData), -1, &(itemStruct->rcItem), DT_SINGLELINE | DT_CENTER | DT_VCENTER);
break;
}
case WM_DESTROY:
{
PostQuitMessage(NULL);
break;
}
default:
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
return NULL;
}
It seems to be part of the non-client area of the window. If that's the case then to paint there you need to handle WM_NCPAINT.
It is a single pixel line above the window's client area, so for example if I add the following code to your program I can paint it in red.
// ... in the WNDPROC
case WM_NCPAINT:
{
auto result = DefWindowProc(hWnd, WM_NCPAINT, wParam, lParam);
HDC hdc = GetWindowDC(hWnd);
RECT r = GetNonclientMenuBorderRect(hWnd);
HBRUSH red = CreateSolidBrush(RGB(255, 0, 0));
FillRect(hdc, &r, red);
DeleteObject(red);
ReleaseDC(hWnd, hdc);
return result;
}
// ... elsewhere
RECT MapRectFromClientToWndCoords(HWND hwnd, const RECT& r)
{
RECT wnd_coords = r;
// map to screen
MapWindowPoints(hwnd, NULL, reinterpret_cast<POINT*>(&wnd_coords), 2);
RECT scr_coords;
GetWindowRect(hwnd, &scr_coords);
// map to window coords by substracting the window coord origin in
// screen coords.
OffsetRect(&wnd_coords, -scr_coords.left, -scr_coords.top);
return wnd_coords;
}
RECT GetNonclientMenuBorderRect(HWND hwnd)
{
RECT r;
GetClientRect(hwnd, &r);
r = MapRectFromClientToWndCoords(hwnd, r);
int y = r.top - 1;
return {
r.left,
y,
r.right,
y+1
};
}
Now an issue with the above code is that it is over-painting the rectangle after the default non-client painting is done. In theory this could flicker; in practice I don't notice a flicker. If it did flicker, however, a safer way to do this would be to modify the WPARAM you pass to DefWindowProc(hWnd, WM_NCPAINT, ... ) such that it is the handle to a region that is the region passed to WM_NCPAINT minus the rectangle you want to paint. This doesnt seem necessary to me, for whatever reason.
If you are using themes / visual styles, which pretty much everything is nowadays, you can't override a lot of the menu styling without using a workaround like https://github.com/adzm/win32-custom-menubar-aero-theme which also uses the same approach to get rid of the white line. Note that you will need to handle this in WM_NCPAINT and WM_NCACTIVATE.
I am very new to the win10 dev, and I am trying to create a win10 app which will create a floating window in all the monitors the system is connected to. So far I am successful in using GDI API to create window in my primary monitor, but it is not working on my secondary monitor, I cannot get why it is not working even when I am using the API as mentioned in the microsoft page.
Below is my code
// Register the window class.
WNDCLASSEX wcex = { sizeof(WNDCLASSEX) };
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = DXGIDraw::WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = sizeof(LONG_PTR);
wcex.hInstance = HINST_THISCOMPONENT;
wcex.hbrBackground = NULL;
wcex.lpszMenuName = NULL;
wcex.hCursor = LoadCursor(NULL, IDI_APPLICATION);
wcex.lpszClassName = L"DemoApp";
RegisterClassEx(&wcex);
m_hwnd = CreateWindowEx(WS_EX_LAYERED,
L"DemoApp",
L"Demo App",
0,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
HWND_DESKTOP,
NULL,
HINST_THISCOMPONENT,
NULL
);
const int nWidth = GetSystemMetrics(SM_CXSCREEN);
const int nHeight = GetSystemMetrics(SM_CYSCREEN);
CImage img;
DISPLAY_DEVICE ddd;
ZeroMemory(&ddd, sizeof(ddd));
ddd.cb = sizeof(ddd);
for (int i = 0; EnumDisplayDevices(NULL, i, &ddd, 0); i++)
{
if (ddd.StateFlags & DISPLAY_DEVICE_ACTIVE) {
//Active monitor
}
if (ddd.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) {
//Primary monitor
}
else {
//other types
}
}
//The following API supposed to work for all the monitors, but this API is not working. This is where I need attention.
HDC hdcScreen = CreateDC(ddd.DeviceName, NULL, NULL, NULL);
//But if I use below API I can get it working for the primary monitor only, still trying to understand why
//HDC hdcScreen = CreateDC(L"DISPLAY", NULL, NULL, NULL);
HDC hDC = CreateCompatibleDC(hdcScreen);
HBITMAP hBmp = CreateCompatibleBitmap(hdcScreen, nWidth, nHeight);
HBITMAP hBmpOld = (HBITMAP)SelectObject(hDC, hBmp);
img.Draw(hDC, 0, 0, nWidth, nHeight, 0, 0, nWidth, nHeight);
//Add layered window
BLENDFUNCTION blend = { 0 };
blend.BlendOp = AC_SRC_OVER;
blend.SourceConstantAlpha = 255;
blend.AlphaFormat = AC_SRC_ALPHA;
POINT ptLocation = { 0, 0 };
SIZE szWnd = { nWidth, nHeight };
POINT ptSrc = { 0, 0 };
BOOL status1 = UpdateLayeredWindow(m_hwnd, hdcScreen, &ptLocation, &szWnd, hDC, &ptSrc, 0, &blend, ULW_ALPHA);
//Set window's position
BOOL status = SetWindowPos(m_hwnd, HWND_TOPMOST, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE);
hr = m_hwnd ? S_OK : E_FAIL;
if (SUCCEEDED(hr))
{
BOOL status;
status = ShowWindow(m_hwnd, SW_MAXIMIZE);
status = UpdateWindow(m_hwnd);
}
SelectObject(hDC, hBmpOld);
DeleteObject(hBmp);
DeleteDC(hDC);
ReleaseDC(NULL, hdcScreen);
}
EnumDisplayDevices is the wrong API for this job. You need to use EnumDisplayMonitors which gives you the monitor coordinates directly.
You need to retreive the bounding rectangle for the desired monitor within the virtual screen, and then you can position a window within that rectangle as desired. Use EnumDisplayMonitors() to get the rectangle of each moinitor. Or, if you have an HMONITOR handle to a specific monitor, you can use GetMonitorInfo().
For xtow, I want to draw a top-level window with the standard non-client area and the client area filled with a bitmap which has an alpha channel.
I now discover the way I have implemented this works on Windows 7, but doesn't render correctly on Windows 8.1, leaving behind images of the window contents when it is moved or maximized.
To investigate, I made a simple test program alpha-test, which
Uses DwmEnableBlurBehindWindow() to set a non-intersecting blur region, so that alpha values in the window are honoured, without blur.
Uses BitBlt() to copy a bitmap with alpha into it.
//
// g++ alpha-test.cc -o alpha-test -mwindows -lgdiplus -ldwmapi
//
#define _WIN32_WINNT 0x0600
#include <assert.h>
#include <stdio.h>
#include <windows.h>
#include <gdiplus.h>
#include <dwmapi.h>
int width = 360;
int height = 360;
HBITMAP hBitmap;
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdcUpdate = BeginPaint(hWnd, &ps);
RECT rc;
GetClientRect(hWnd, &rc);
HBRUSH hbrush = CreateSolidBrush(RGB(0,0,0));
FillRect(hdcUpdate, &rc, hbrush);
DeleteObject(hbrush);
HDC hdcMem = CreateCompatibleDC(hdcUpdate);
HBITMAP hbmpold = (HBITMAP)SelectObject(hdcMem, hBitmap);
if (!BitBlt(hdcUpdate, 0, 0, ps.rcPaint.right, ps.rcPaint.bottom, hdcMem, 0, 0, SRCCOPY))
{
printf("BitBlt failed: 0x%08x\n", (int)GetLastError());
}
SelectObject(hdcMem, hbmpold);
DeleteDC(hdcMem);
EndPaint(hWnd, &ps);
}
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
}
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
ULONG_PTR gdiplusToken;
Gdiplus::GdiplusStartupInput gdiplusStartupInput;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
LPCTSTR szWindowClass = "TransparentClass";
// Register class
WNDCLASSEX wcex = {0};
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW; // | CS_OWNDC;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = NULL;
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = NULL;
wcex.hbrBackground = (HBRUSH)CreateSolidBrush(0x00000000);
RegisterClassEx(&wcex);
// Create window
HWND hWnd = CreateWindowEx(WS_EX_APPWINDOW,
szWindowClass,
"Transparent Window",
WS_OVERLAPPED | WS_SYSMENU,
CW_USEDEFAULT, CW_USEDEFAULT, width, height,
NULL, NULL, hInstance, NULL);
Gdiplus::Bitmap *m_pImage = Gdiplus::Bitmap::FromFile(L"sample.png", FALSE);
Gdiplus::Color bg(0,0,0,0);
m_pImage->GetHBITMAP(bg, &hBitmap);
assert(hBitmap);
DWM_BLURBEHIND blurBehind = { 0 };
blurBehind.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
blurBehind.hRgnBlur = CreateRectRgn(0, 0, -1, -1);
blurBehind.fEnable = TRUE;
blurBehind.fTransitionOnMaximized = FALSE;
DwmEnableBlurBehindWindow(hWnd, &blurBehind);
DeleteObject(blurBehind.hRgnBlur);
ShowWindow(hWnd, SW_SHOW);
// Main message loop
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
Is this really broken? How can I fix my code? Is this a Windows bug/limitation?
Is there another way to achieve my goal of drawing a bitmap with alpha into a window with a border?
Update:
I did some tests using Direct2D and Direct3D to fill the client area with the
bitmaps, but they mis-rendered in the same way.
The DWM doesn't do blurring any more (this feature was deemed too power hungry and was removed in Windows 8), so I'd guess that it's not properly compositing the background area of your window any more - and therefore you aren't getting the "automatic" alpha effect it was giving you in Windows 7.
This is kind of an unusual way to draw transparent windows to be honest. Using UpdateLayeredWindow is the "official" way and would have the benefit of working on Windows 8 as well as Windows 7.
I'm trying to create a simple window in Win32 and draw a rectangle in it, but for some reason FillRect isn't working for me. Here's my source:
#include <windows.h>
#include "resource.h"
RECT rect;
LRESULT CALLBACK WndProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
static PAINTSTRUCT ps;
static HDC hDC;
switch(msg)
{
case WM_PAINT:
hDC = BeginPaint(hWnd, &ps);
FillRect(hDC, &rect, (HBRUSH)(COLOR_WINDOW+1));
EndPaint(hWnd, &ps);
break;
case WM_CLOSE:
DestroyWindow(hWnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, msg, wParam, lParam);
}
return 0;
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX wc;
HWND hWnd;
MSG msg;
rect.left = 0;
rect.right = 0;
rect.top = 100;
rect.bottom = 100;
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_ACTIVEBORDER+1);
wc.lpszMenuName = MAKEINTRESOURCE(IDR_MAIN_MENU);
wc.lpszClassName = "Main";
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
RegisterClassEx(&wc);
hWnd = CreateWindowEx(NULL, "Main", "Main", WS_SYSMENU | WS_MINIMIZEBOX, CW_USEDEFAULT, CW_USEDEFAULT, 240, 360, NULL, NULL, hInstance, NULL);
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
while(GetMessage(&msg, NULL, 0, 0) > 0)
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
Is there something I'm missing or doing wrong in my code? Thanks in advance
Your code is fine. The problem is that you have
rect.left = 0 and rect.right = 0 and the rect.top and rect.bottom are also the same. So your rect is 0 size.
Try this
rect.left = 0;
rect.right = 100;
rect.top = 0;
rect.bottom = 100;