I'm made a new Win 32 exe and re created all the similar MFC Dialog stuff. Anyway, I add controls to the .rc file and define them, No troubles. I open up the class wizard, and create a new class, derived from CDialog. Still no troubles. I create variables for the control, based on control classes, NOT other variables (eg boolean, int). I run the program works fine. I use the Control Variables to change the controls, eg. Add items to list box. via AddString, and I get and assertion failure. I decide to use SendMessageAPI, nothing happens. What is wrong?

Thanx for the help in Advance.