Question

I know how to stimulate clicks using User32 SendInput method and what I need is a similar User32 method but to obtain the current mouse button state.

Something similar to:

public static extern bool GetCursorPos(ref System.Drawing.Point lpPoint);

Function GetCursorPos gives me the current cursor position. What I need is the left button state (if it’s clicked or not). Is there such a function?

Answer 1

There’s a method called GetAsyncKeyState. The method signature looks like this:


[DllImport("user32.dll")]
public static extern short GetAsyncKeyState(UInt16 virtualKeyCode);


Then you simply call it passing the left mouse key code (VK_LBUTTON = 0x01) and off you go.

More information directly from MSDN.