Greetings: I am attempting to implement toolbar window message 0x463 -- which, as far as I can tell, is undocumented. If anyone has any information about it, I would love to hear it. I currently have a question about a difference in the implementation of comctl32.dll under Wine vs Windows. In both Wine and Windows, the function ToolbarWindowProc starts by calling GetWindowLongA (hwnd, 0) and treats the returned value as a pointer to a structure. Under wine the structure is the TOOLBAR_INFO structure defined in dlls/comctl32/toolbar.c. Under Windows, I have no idea what the structure looks like. Using the debugger, I can see that the first two elements of the structure are the hwnd numbers of the window and its parent -- but after that it is not very obvious. The structure is over 150 bytes in size. Does anyone know what the structure under Windows looks like? Thanks, Jeremy Shaw. jeremy(a)lindows.com