How does the MultiByteToWideChar function treat invalid characters?

Raymond ChenMay 4, 2012May 4, 201205/4/12

The MB_ERR_INVALID_CHARS flag controls how the Multi­Byte­To­Wide­Char function treats invalid characters. Some people claim that the following sentences in the documentation are contradictory: "Starting with Windows Vista, the function does not drop illegal code points if the application does not set the flag." "Windows...