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PostMessage(HWND  , WM_LBUTTONDOWN, 0, MakeLParam(Pos.X, Pos.Y)); 
Procedure  (Handle, Welcher Button, 0, Position                 ;                    

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setcursorpos(365,674);                    

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    WindowHandle := FindWindow(nil, PChar('Form1'));
    if WindowHandle <> 0 then
      PostMessage(WindowHandle , WM_LBUTTONDOWN, 0, 0);                    

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PostMessage(WindowHandle , WM_SYSCOMMAND,SC_MINIMIZE,0))                    

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    SetCursorPos (-1000,300);
    mouse_event(MouseEventF_leftDown,0,0,0,0);
    mouse_event(MouseEventF_leftup,0,0,0,0);                    

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private long MakeLParamMacro(ushort lo, ushort hi)
{
    return lo | hi << 16; 
}                    

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static uint WM_LBUTTONDOWN = 0x201;
        static uint WM_LBUTTONUP = 0x202;
        static uint MK_LBUTTON = 0x1;
        static uint WM_MOUSEMOVE = 0x200;


        [DllImport("user32.dll", SetLastError = true)]
        static extern bool PostMessage( IntPtr hWnd, uint msg, uint wParam,
            int lParam );

        public static void SendClick(IntPtr HWND, int x, int y)
        {

            PostMessage(HWND, WM_MOUSEMOVE, 0, MakeLParam(x, y));
            PostMessage(HWND, WM_LBUTTONDOWN, MK_LBUTTON, MakeLParam(x, y));
            PostMessage(HWND, WM_LBUTTONUP, MK_LBUTTON, MakeLParam(x, y));
        }

        private static int MakeLParam(int LoWord, int HiWord)
        {
             return (int) ((HiWord << 16) | (LoWord & 0xffff));
        } 


            hWnd = WinApi.FindWindow(listBox1.SelectedItem.ToString());
            WinApi.SendClick(hWnd, 1219, 157);