The string for verifying the rationality of the MFC Setting Dialog Box and the rationality of the mfc

The string for verifying the rationality of the MFC Setting Dialog Box and the rationality of the mfc

After DDX is associated with a control variable, rationality verification is often not what we need. For example, "enter an integer" and "please enter a integer ".

DDX is actually an encapsulation call of GetDlgItem. For this reason, you can enter the rc file corresponding to the project, first comment out afxres. rc. Then add a string

For example

Stringtable begin AFX_IDP_PARSE_REAL "hello" END

If the edit box corresponding to a floating point number is blank, the UpdateData (TRUE) will jump out of hello.

The DDX principle can be used to debug UpdateData (TRUE) in one step.