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[Luckie]

Das hat Christian doch schon geschrieben, dass das mit Shellexecute nicht geht:

Zitat:

Returns a value greater than 32 if successful, or an error value that is less than or equal to 32 otherwise. The following table lists the error values. The return value is cast as an HINSTANCE for backward compatibility with 16-bit Windows applications. It is not a true HINSTANCE, however. The only thing that can be done with the returned HINSTANCE is to cast it to an int and compare it with the value 32 or one of the error codes below.

Code:

0 The operating system is out of memory or resources. 
ERROR_FILE_NOT_FOUND The specified file was not found. 
ERROR_PATH_NOT_FOUND The specified path was not found. 
ERROR_BAD_FORMAT The .exe file is invalid (non-Microsoft Win32 .exe or error in .exe image). 
SE_ERR_ACCESSDENIED The operating system denied access to the specified file. 
SE_ERR_ASSOCINCOMPLETE The file name association is incomplete or invalid. 
SE_ERR_DDEBUSY The Dynamic Data Exchange (DDE) transaction could not be completed because other DDE transactions were being processed. 
SE_ERR_DDEFAIL The DDE transaction failed. 
SE_ERR_DDETIMEOUT The DDE transaction could not be completed because the request timed out. 
SE_ERR_DLLNOTFOUND The specified dynamic-link library (DLL) was not found. 
SE_ERR_FNF The specified file was not found. 
SE_ERR_NOASSOC There is no application associated with the given file name extension. This error will also be returned if you attempt to print a file that is not printable. 
SE_ERR_OOM There was not enough memory to complete the operation. 
SE_ERR_PNF The specified path was not found. 
SE_ERR_SHARE A sharing violation occurred.

Code:

/* regular WinExec() codes */
#define SE_ERR_FNF              2       // file not found
#define SE_ERR_PNF              3       // path not found
#define SE_ERR_ACCESSDENIED     5       // access denied
#define SE_ERR_OOM              8       // out of memory
#define SE_ERR_DLLNOTFOUND              32

#endif /* WINVER >= 0x0400 */

/* error values for ShellExecute() beyond the regular WinExec() codes */
#define SE_ERR_SHARE                    26
#define SE_ERR_ASSOCINCOMPLETE          27
#define SE_ERR_DDETIMEOUT               28
#define SE_ERR_DDEFAIL                  29
#define SE_ERR_DDEBUSY                  30
#define SE_ERR_NOASSOC                  31