Displaying Mouse co-ordinates in an edit box

I'm working on a dialog based MFC. I have used a Picture Box Control to draw a rectangle and written the code for drawing in the picture box using a sperate class inherited from CStatic (Pict Class). I wish to capture the mouse co-ordinates as it moves inside the Picture box(only) and display the co-ordintaes to the user on the Dialog screen using an edit box. i have handled the onMouseMove function to get the co-ordinates. But i'm facing the difficulty to display it to the user. Can somebody please help me out in this. I want the edit to display the refreshed co-ordinates as soon as the mouse moves inside the Picture Box. I'm attaching the PictureCtrlDlg.cpp and the Pict.cpp file for refrence.

With the approach you have started, ou need to get the mouse coordinates from the CPoint that's passed into OnMouseMove, format them into m_value, then call UpdateData.

I'd go for a CStatic rather than a CEdit.

Apart from above suggestion .Why not put a tooltip on Mouse pointer itself . Instead of using any third control .

Thanks