What's the best way to concatenate a string using Win32? If Understand correctly, the normal C approach would be to use strcat, but since Win32 now deals with Unicode strings (aka LPWSTR), I can't think of a way for strcat to work with this.
Is there a function for this, or should I just write my own?
lstrcat comes in ANSI and Unicode variants. Actually lstrcat is simply a macro defined as either lstrcatA or lstrcatW.
These functions are available by importing kernel32.dll. Useful if you're trying to completely avoid the C runtime library. In most cases you can just use wcscat or _tcscat as roy commented.
Also consider the strsafe.h functions, such as StringCchCat These come in ANSI and Unicode variants as well, but they help protect against buffer overflow.
来源：https://stackoverflow.com/questions/9440768/concatenating-a-string-using-win32-api