The GetMessagePos function returns a long value that gives the cursor position in screen coordinates. This position is the point occupied by the cursor when the last message retrieved by the GetMessage function occurred.
DWORD GetMessagePos(VOID)
This function has no parameters.
The return value specifies the x- and y-coordinates of the cursor position. The x coordinate is in the LOWORD and the y coordinate is in the HIWORD.
As noted above, the x-coordinate is in the low-order word of the return value; the y-coordinate is in the high-order word. If the return value is assigned to a variable, you can use the MAKEPOINTS macro to obtain a POINTS structure from the return value. You can also use the LOWORD or HIWORD macro to extract the x- or y-coordinate.
To determine the current position of the cursor instead of the position when the last message occurred, use the GetCursorPos function.
GetCursorPos, GetMessage, GetMessageTime, HIWORD, LOWORD, MAKEPOINTS, POINTS