c++ win32 set cursor position

Question

I know which function to use but I can't get it to work right. I used SetCursorPos() the only problem is that it sets the cursor not to the windows coordinates but to the screen coordinates. i also tried the ScreenToClient() but it didn't work ethier.
Here is my code:

pt.x=113;
pt.y=280;
ScreenToClient(hWnd, &pt);
SetCursorPos(pt.x, pt.y);

any idea? I'm using win32. I hope that I given enough information.