The Function Long McIGetDeviceID (Ref String lpstrName) LIBRARY "winmm. DLL" Alias for "McIGetDeviceIDA; ANSI
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String lpstrName
LpstrName=space (64)

McIGetDeviceID (lpstrName)

Messagebox (" ", lpstrName)

How do I also get empty! Please help!!

CodePudding user response:

Supplement: the key is to don't know how to get the lpstrName?