Question

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Why does my simple C++ GUI application show a message box in Chinese?

I have implemented this block of code as below in Visual C++:

int nResult=MessageBox(NULL,
                       (LPCWSTR)"An example of Cancel,Retry,Continue",
                       (LPCWSTR)"Message Box!",
                        MB_ICONWARNING|MB_ABORTRETRYIGNORE);

however, no matter what i tried, it always show a message box in chinese! Therefore, i just want to ask for any solution for my problem and why there is chinese message here. Thanks you!

Answer 1

You forgot to place ‘L’ before the string literal. Modify as follows:

int nResult=MessageBox(NULL,
                   L"An example of Cancel,Retry,Continue",
                   L"Message Box!",
                   MB_ICONWARNING|MB_ABORTRETRYIGNORE);

In C++ unicode string literals are prefixed with L. If you don’t put the prefix, casting to ‘unicode string constant’ won’t help and causes incorrect interpreting of the memory location.