Thread: Simulate Left Mouse Button (VK_LBUTTON)

Originally Posted by Vicious

The OP is using .NET, but I believe he's attempting calls out of a win32 api dll so it should be enough to send you in the right direction.

It's the wrong direction (explanations in MSDN)
The right method is SI()

Since you posted in the Windows forum and not the C# forum, I'll assume you want to simulate a left mouse button using Win32 API.

With that said, give the following a try to see if it works:

Code:

  INPUT    Input={0};
  // left MB down 
  Input.type      = INPUT_MOUSE;
  Input.mi.dwFlags  = MOUSEEVENTF_LEFTDOWN;
  SendInput(1,&Input,sizeof(Input));
  // lef MB up
  ZeroMemory(&Input,sizeof(INPUT));
  Input.type      = INPUT_MOUSE;
  Input.mi.dwFlags  = MOUSEEVENTF_LEFTUP;
  SendInput(1,&Input,sizeof(Input));