Traping user typing in a window

[SmileeTiger]

I have been building a calculator appliation but right now the user either has to click a button or enter numbers directly into an edit box to change their input. Is there a way to 'trap' this information and handle it with my own procedure?

Smilee

 

[hcexi]

When some user presses a key the active ( focused ) window receives WM_KEYDOWN, WM_CHAR and WM_KEYUP messages. Maybe you could create your own class for edit box and catch these messages...