I am using ShellExecute the same way given below, to open a txt file in Delphi7, it gives me access violation in module BORdbk70.dll.
Not sure what this issue is? I have added ShellApi in uses list.
//sAddr := 'www.google.com';
Above line does not gives any error but also not redirect to browser and
ShellExecute returns result as "5 = Windows 95 only: The operating system denied access to the specified file"
sAddr := 'c:\text\info.txt';
res := ShellExecute(Handle, nil, PChar(sAddr), nil, nil, SW_SHOW);
showmessage(inttostr(res));
This example that I wrote for you, working good (without error). I tested with Delphi7 on Windows 8.1
You must know what is default application to open *.txt files in your Operation System. That application will try open your file. On my system for *.txt default application is Notepad++ and this example opened file info.txt in Notepad++
Full source (pas) code:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ShellApi;
type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
var
sAddr : String;
res : Integer;
begin
sAddr := 'c:\text\info.txt';
res := ShellExecute(Handle, 'open', PChar(sAddr), nil, nil, SW_SHOW);
showmessage(inttostr(res));
end;
end.
This example working good with admin and normal user rights.
var
file:string;
exe_start_map:string;
begin
exe_start_map:=(ExtractFileDir(Application.ExeName));
file:=exe_start_map+'\samplefile.txt';
ShellExecute(handle,'open',pchar(file),'','',SW_SHOWnormal);
end;
you must add ShellApi in uses list
Related
I have a simple Application that reads data from an .ini file into a record, and then does a ShellExecute. However, when I run it in debug mode,it tells me that the True free heap isn't what it should be:
"True heap size: 688128, True free heap: 688016, Should be: 688128"
This only happens if I actually run the ShellExecute (however even if I don't run the ShellExecute, I get a True free heap of 688016, but no complaint that it should be 688128), so I wonder if I either need to free the PChar() conversion (which shouldn't be the case from all that I've read), or the handle returned by ShellExecute (though CloseHandle(ShellHandle); doesn't change the message), or if it's intended behavior?
The IniSettings.SetupCommand in question is an .msi file that triggers a UAC prompt, but I really just want to make this a Fire & Forget thing since my Lazarus app doesn't care what it launches.
For reference, here's my whole Unit. I'm using Lazarus 1.6.2, FPC 3.0.0, i386-win32, and I'm targeting Windows only with this. My Debug Settings are at the very bottom, after the code.
unit MainUnit;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, FileUtil, Forms, Controls,
Graphics, Dialogs, StdCtrls, IniFiles, Windows;
type
{ IniSettings }
TAutorunIniSettings = record
AutorunTitle: AnsiString;
SetupCommand: AnsiString;
end;
{ TMainForm }
TMainForm = class(TForm)
btnSetup: TButton;
lblTitle: TLabel;
procedure btnSetupClick(Sender: TObject);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
{ private declarations }
IniSettings: TAutorunIniSettings;
public
{ public declarations }
end;
var
MainForm: TMainForm;
implementation
{$R *.lfm}
{ TMainForm }
procedure TMainForm.FormCreate(Sender: TObject);
var
AutorunIni: TIniFile;
begin
try
AutorunIni := TIniFile.Create('Autorun.ini');
IniSettings.AutorunTitle := AutorunIni.ReadString('Autorun', 'Title', 'Autorun');
IniSettings.SetupCommand := AutorunIni.ReadString('Autorun', 'Setup', '');
self.Caption := IniSettings.AutorunTitle;
finally
if(AutorunIni <> nil) then AutorunIni.Free;
end;
end;
procedure TMainForm.FormDestroy(Sender: TObject);
begin
end;
procedure TMainForm.btnSetupClick(Sender: TObject);
begin
ShellExecute(0, 'open', PChar(IniSettings.SetupCommand), nil, nil, SW_SHOWNORMAL);
end;
end.
I would like to display the contents of a directory using DOS commands from Delphi(7). Using Win10 - 64
The following program displays the DOS shell but does not display the directory contents. What is wrong with my code ?
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, shellapi;
type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
var i : integer;
begin
i := ShellExecute(Handle, nil, 'cmd.exe', PChar(' dir'), nil, SW_SHOW);
caption := inttostr(i);
end;
end.
Running your code on Windows 10 returns 2, which is ERROR_FILE_NOT_FOUND.
I got it to work, on both 32- and 64-bit target platforms, by changing it to
this:
var
ComSpec: string;
retval: HINSTANCE;
begin
ComSpec := GetEnvironmentVariable('comspec');
retval := ShellExecute(Handle, nil, PChar(comspec), '/k dir', nil, SW_SHOW);
if retval <= 32 then
Caption := Format('Error, return value = %d', [retval])
else
Caption := 'Success';
end;
The /k says to run a new instance of cmd.exe and keep the window open. For more details, run cmd /? from a command prompt.
Note that the error handling of ShellExecute is very limited. If you wish to check for errors comprehensively then you must use ShellExecuteEx instead.
With respect to a TEdit component, would it be possible for the component to handle a multi-line paste from the Windows Clipboard by converting line breaks to spaces?
In other words, if the following data was on the Windows Clipboard:
Hello
world
!
...and the user placed their cursor in a TEdit then pressed CTRL+V, would it be possible to have the TEdit display the input as:
Hello world !
You'd need to subclass the TEdit using an interposer class, and add a handler for the WM_PASTE message:
unit Unit3;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, DB, adsdata, adsfunc, adstable;
type
TEdit= class(StdCtrls.TEdit)
procedure WMPaste(var Msg: TWMPaste); message WM_PASTE;
end;
type
TForm3 = class(TForm)
AdsTable1: TAdsTable;
Edit1: TEdit;
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form3: TForm3;
implementation
{$R *.dfm}
uses
Clipbrd;
{ TEdit }
procedure TEdit.WMPaste(var Msg: TWMPaste);
var
TempTxt: string;
begin
TempTxt := Clipboard.AsText;
TempTxt := StringReplace(TempTxt, #13#10, #32, [rfReplaceAll]);
Text := TempTxt;
end;
end.
I'm having trouble getting to grips with DLLs in Delphi 7. I have two problems:
1) The procedure takes an integer parameter - but the dll receives a different value to the one I pass.
2) The application that called the dll crashes with an access violation after the function completes.
Here's my dll code:
library apmDLL;
uses
Classes, Messages, Windows, Dialogs, sysutils ;
const
WM_MY_MESSAGE = WM_USER + 1;
procedure sendtoACRPM (functionKey : integer); stdcall;
begin
showmessage('You sent - '+inttostr(functionKey));
showmessage('Finished Now');
end;
exports sendtoACRPM;
end.
So when I call this with the code below I get:
'Sending - 1'
'You Sent - 1636532'
'Finished Now'
Then the calling application crashes with an access violation.
The calling application looks like this:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, shlobj, shellapi;
const
WM_MY_MESSAGE = WM_USER + 1;
type
TForm1 = class(TForm)
Edit1: TEdit;
Button2: TButton;
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
procedure sendtoACRPM (functionKey : integer) ; external 'apmDLL.dll';
implementation
{$R *.dfm}
procedure TForm1.Button2Click(Sender: TObject);
var
myInt: integer;
begin
myInt := strtoint(edit1.text);
showmessage('Sending - ' + inttostr(myInt));
sendtoACRPM(myInt);
end;
end.
Any ideas what I'm doing wrong here?
You need stdcall both in the DLL and in the calling code declaration. You only have it in the DLL.
Calling conventions need to match on both sides. :-)
procedure sendtoACRPM (functionKey : integer); stdcall; external 'apmDLL.dll';
You should use the standard Windows MessageBox instead of ShowMessage, so that the DLL can be used from non-Delphi applications as well.
I'm trying to upload a file .txt in my web space, but then the problems start, the code I tried is this:
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient,
IdExplicitTLSClientServerBase, IdFTP, StdCtrls;
procedure TForm1.Button1Click(Sender: TObject);
var
FTP:tidftp;
begin
FTP.Host:='website.altervista.org';
FTP.Username:='website';
FTP.Password:='password';
FTP.Port:=25;
FTP.Connect;
FTP.Put('C:\Users\user\Desktop\text.txt');
FTP.Quit;
end;
I'm not getting any error, but when I start the program and I click on the button, I get an error:
and immediately after another:
and the button disappears.
Why? Thanks!
You have to instantiate the TIdFTP object for your local variable FTP before you access it. So try to use this:
procedure TForm1.Button1Click(Sender: TObject);
var
FTP: TIdFTP;
begin
FTP := TIdFTP.Create(nil);
try
FTP.Host := 'serioussamhd.altervista.org';
FTP.Username := 'serioussamhd';
FTP.Password := 'password';
FTP.Port := 21;
FTP.Connect;
FTP.Put('C:\Users\user\Desktop\text.txt');
FTP.Quit;
finally
FTP.Free;
end;
end;
You must create the instance of the tidftp first.
var
FTP:tidftp;
begin
FTP:=Tidftp.Create(nil); //create the instance
try
FTP.Host:='siteweb.altervista.org';
FTP.Username:='siteweb';
FTP.Password:='password';
FTP.Port:=25;
FTP.Connect;
FTP.Put('C:\Users\user\Desktop\text.txt');
FTP.Quit;
finally
FTP.Free;
end;
end;