I want to implement "whats this" functionality as seen in most of windows programs. For example -> When you right click on desktop and select properties and when u again right click on the properties dialog you get a pop up menu with "whats this". When i click on that u get a timy description of that part of the dialog. How do i do that. Can you give me an example program. How do you implement "whats this" in a win32 program using windows api. Is there any example program on the net with source code using which i can learn to implement it in my program.