I have a desk band project that I made from Microsoft's Sample Desk Band project template. I have another application that calls EnumWindows() to get an HWND for the desk band window. This works fine. Now I wish to use PostMessage() from the other application to send a WM_USER message to the desk band window. This is fine, except I don't know where to find the WndProc for the "main" desk band window. I created a child window when the band initializes, and that WndProc of course I have (I wrote it). But I need to put a message handler into the WndProc for it's parent. How do I do this? Replies to NG please. Thanks. RDeW