how to send mouse click message to other application

Question

4.00/5 (1 vote)

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The code I'm using :

C#

void function()
{
  Process []x=Process.GetProcessesByName(@"applicationName");
  const uint WM_LBUTTONDOWN = 0x0201;
  const uint WM_LBUTTONUP = 0x0202;
  int dword = MakeDword(17, 230);

  SendMessage(x[0].MainWindowHandle, WM_LBUTTONDOWN,      (IntPtr)MouseButtons.Left, (IntPtr)dword);

 SendMessage(x[0].MainWindowHandle, WM_LBUTTONUP,   (IntPtr)MouseButtons.Left, (IntPtr)dword);
}
public static int MakeDword(short pValueLow, short pValueHigh)
{
    if (pValueHigh == 0)
    {
        return (int)pValueLow;
    }
    int lTemp = sizeof( short);
    lTemp = pValueHigh &lt;&lt; ((4) - (lTemp + 1));
    return (int)(lTemp | pValueLow);
}

applicationName.exe Should show having clicked at point 17,230 or whatever coordinate. But it doesn't seem this is happening.

Please tell me some solution, and what is wrong with this code.

Posted 23-Feb-11 7:50am

Rohit Bansal The Great

Updated 23-Feb-11 7:53am

TweakBird

v2

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TweakBird 23-Feb-11 13:54pm

Please use <pre> tag for code blocks.

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#realJSOP · Accepted Answer · 2011-02-23T07:58:00

You need the HWnd of the window that's going to receive the message, and use the PostMessage Windows API method (see pinvoke.net for details and prototypes). You should also only have to send the WM_LBUTTONUP to get the desired result. Next, you're going to have to google WM_LBUTTONUP to see what parameters to set in the PostMessage method call.

Here's the stuff you need for PostMessage:

using System.Runtime.InteropServices;

C#

//-------------------------------------------------------------------------
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("user32.dll", SetLastError=true, CharSet=CharSet.Auto)]
static extern bool PostMessage(IntPtr hwnd, uint Msg, IntPtr wParam, IntPtr lParam);