window handlers

[snow_cap]

Hi,

I have created an application that can capture the window handle "hwnd" using mouse pointer,but the problem is if i open word i receive a handle,then if i close word and open it again i receive a different handle.My problem is am trying to find something fix that will tell me it is word other than the window title,i need to always know that my mouse pointer is on this application if if i closed it and opened it again.To be more precise how to distinguish a window from another.

Any help would be appreciated.