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[Luckie]

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Zitat:

Return Value
If the function succeeds, the return value is greater than 31.

If the function fails, the return value is one of the following error values.

Code:

Return code/value Description 

0 The system is out of memory or resources.
ERROR_BAD_FORMAT The .exe file is invalid.
ERROR_FILE_NOT_FOUND The specified file was not found.
ERROR_PATH_NOT_FOUND The specified path was not found.

Und das:

Zitat:

Security Remarks
The executable name is treated as the first white space-delimited string in lpCmdLine. If the executable or path name has a space in it, there is a risk that a different executable could be run because of the way the function parses spaces. The following example is dangerous because the function will attempt to run "Program.exe", if it exists, instead of "MyApp.exe".