I have an MFC dialog in which there are two radio buttons. I have put them in a nice group, their IDCs are one after each other (RB_LEFT, RB_RIGHT).
I want to use DDX_Radio so I can access the buttons using an integer value so in the function DoDataExchange I call :
DDX_Radio(pDX, RB_LEFT, mRBLeftRight);
where mRBLeftRight is a member variable of integer type. I also need to edit the buttons properties so I wanted to use a DDX_Control to map them on member variables mRBLeft and mRBRight (CButton):
DDX_Control(pDX, RB_LEFT, mRBLeft);
DDX_Control(pDX, RB_RIGHT, mRBRight);
Now if I do the call to DDX_Control, whenever DoDataExchange is called, the application crashes because DDX_Control forces RB_LEFT to handle a message that DDX_Radio cannot handle. This part I understand.
I decided to not use DDX_Control (removed the calls in DoDataExchange) and just keep a pointer to my radio buttons (CButton*) in my classes. So in my OnInitDialog function, I do the following calls :
mRBLeft= ((CButton*)GetDlgItem(RB_LEFT));
mRBRight = ((CButton*)GetDlgItem(RB_RIGHT));
Now as long as I don't use mRBLeft it's going to be fine, but if I do, bam, crash on DoDataExchange. The thing that really puzzles me is if I change my left radio button using
((CButton*)GetDlgItem(RB_LEFT)->SetCheck(true)
it's going to work. Sooo what's the difference ?
(I know it's a lot of hassle for little, but I just wanna understand the mechanics)