What 'L ' mean in this statement?

Graphics and GPU Programming Programming

2 comments, last by wah_on_2 22 years ago

122

Author

March 23, 2002 01:10 AM

I found a DSound sample program from web but i don''t understand the meaning of ''L'' in the below statement. Can explain?

  
    m_pLoader->LoadObjectFromFile(CLSID_DirectMusicSegment, IID_IDirectMusicSegment8, L"sound.mid", (void **) &m_pBkgdMusic);

Thanks!

546

March 23, 2002 02:20 AM

It means the string is Unicode, as opposed to ASCII. An example:


char *AsciiString = "Ascii String";
wchar_t *UnicodeString = L"Unicode String";

wchar_t is just a typedef for "unsigned short".

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122

Author

March 23, 2002 02:33 AM

Thanks, however, if i have a
char filePath[100] = "c:\sound01.wav";

how can i convert is to Unicode?

262

March 23, 2002 02:38 AM

  WCHAR  Name[100];	MultiByteToWideChar(CP_ACP, 0, filePath, -1, (unsigned short *)Name, 100);

This should do the job.

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