About global variables

血色占卜师

I define the global variable extern CString abc;
Why am I getting error C2071: 'abc': illegal storage class?
It's weird!

rockandrb

Extern means that the variable you want to define has been defined elsewhere, just declare it here.

Just remove extern.

血色占卜师

I want to create a new dialog through a button of the main dialog (two dialogs use different dialog classes), define a global variable in the main dialog ccp, such as CString str; declare extern in the new dialog cpp CString str ;, but in the main dialog box to assign a value to str, the new dialog box is still the initial value of str, has not changed, I am very confused! Ask prawn to help!

food0012

How do you set this global variable?

If you just need to pass a string, add a public variable in the sub-dialog box. Assign it before DoModel.

血色占卜师

Thank you both!
I assigned the value after DoModel, so no!