Tag Archives: error C2065

Error c2065: ‘QAPP’: undeclared identifier [Solved]

error: qApp was not declared in this scope.

Solution: Add the Header File:

#include <QApplication>

error C2065: “_ LPW “: undeclared identifier

Error C2065: “_lpw” : undeclared identifier
error C2065: “_convert” : undeclared identifier
error C2065: “_acp” : undeclared identifier

Reason: when converting CString into char*, T2A is used, without adding
USES_CONVERSION;