C#

using System.Runtime.InteropServices;
 
private const int BN_CLICKED = 245;
  
[DllImport("User32.dll")]
public static extern Int32 FindWindow(String lpClassName,String lpWindowName);
 
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className,  string  windowTitle);
 
[DllImport("user32.dll", CharSet=CharSet.Auto)]
public static extern int SendMessage(int hWnd, int msg, int wParam, IntPtr lParam);

//in your code ...
 
int hwnd=0;
IntPtr hwndChild=IntPtr.Zero;

//Get a handle for the window
hwnd=FindWindow(null,"XXX"); //set the name
if(hwnd != 0)
{
	//Get a handle for the "OK" button
	hwndChild = FindWindowEx((IntPtr)hwnd,IntPtr.Zero,"Button","OK");
        // Wait
	Thread.Sleep(1000);
        //send BN_CLICKED message
	SendMessage((int)hwndChild,BN_CLICKED,0,IntPtr.Zero);
}

Jefis wrote:

possible to write only in managed code?

Mark T. wrote:

Hi Martin, 27 Feb 2007

First, thanks for posting sample code. I have needed to do this same sort of thing in the past, and would like to learn how. (Pressing a button on a running program, or inserting text, or...)

I wrote a test program with a couple buttons on it, and then I tried your sample code. It successfully identified the other program's window (non-zero pointer), but could not find the button.

This call:
hwndChild = FindWindowEx((IntPtr)hwnd,IntPtr.Zero,"Button","A");
returned zero.

1. Any idea what may have gone wrong with this particular case.
2. Where can I learn more about this? For instance, I don't know where you found the value for BN_CLICKED = 245. I searched online and came up blank.


Thanks for any help.
Mark

Mark T. wrote:

1. Any idea what may have gone wrong with this particular case.

Mark T. wrote:

2. Where can I learn more about this?

ChForm frm = new ChForm();<br />
frm.MdiParent = this;<br />
frm.Show();

fjlv2005 wrote:

customable panel, that can be minimize or maximize

kalyanit wrote:

how to select a particular erroritem in the errolist and also it description