#region 得到光标在屏幕上的位置

 

        

[DllImport(

"user32"

)]

 

         

public 

static 

extern 

bool 

GetCaretPos(

out 

Point lpPoint);

 

         

[DllImport(

"user32.dll"

)]

 

         

private 

static 

extern 

IntPtr GetForegroundWindow();

 

         

[DllImport(

"user32.dll"

)]

 

         

private 

static 

extern 

IntPtr GetFocus();

 

         

[DllImport(

"user32.dll"

)]

 

         

private 

static 

extern 

IntPtr AttachThreadInput(IntPtr idAttach, IntPtr idAttachTo, 

int 

fAttach);

 

         

[DllImport(

"user32.dll"

)]

 

         

private 

static 

extern 

IntPtr GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId);

 

         

[DllImport(

"kernel32.dll"

)]

 

         

private 

static 

extern 

IntPtr GetCurrentThreadId();

 

         

[DllImport(

"user32.dll"

)]

 

         

private 

static 

extern 

void 

ClientToScreen(IntPtr hWnd, 

ref 

Point p);

 

 

         

private 

Point CaretPos()

 

         

{

 

             

IntPtr ptr = GetForegroundWindow();

 

             

Point p = 

new 

Point();

 

 

             

//得到Caret在屏幕上的位置   

 

             

if 

(ptr.ToInt32() != 0)

 

             

{

 

                 

IntPtr targetThreadID = GetWindowThreadProcessId(ptr, IntPtr.Zero);

 

                 

IntPtr localThreadID = GetCurrentThreadId();

 

 

                 

if 

(localThreadID != targetThreadID)

 

                 

{

 

                     

AttachThreadInput(localThreadID, targetThreadID, 1);

 

                     

ptr = GetFocus();

 

                     

if 

(ptr.ToInt32() != 0)

 

                     

{

 

                         

GetCaretPos(

out   

p);

 

                         

ClientToScreen(ptr, 

ref   

p);

 

                     

}

 

                     

AttachThreadInput(localThreadID, targetThreadID, 0);

 

                 

}

 

             

}

 

             

return 

p;

 

         

}

 

         

#endregion