Zitat von
Widows SDK:
Windows 2000: The process calling LogonUser requires the SE_TCB_NAME privilege. If the calling process does not have this privilege, LogonUser fails and GetLastError returns ERROR_PRIVILEGE_NOT_HELD.
Dieses Privileg habe in der Regel nur Systemprozesse.
Und
Zitat:
The account specified by lpszUsername, must have the necessary account rights. For example, to log on a user with the LOGON32_LOGON_INTERACTIVE flag, the user (or a group to which the user belongs) must have the SE_INTERACTIVE_LOGON_NAME account right. For a list of the account rights that affect the various logon operations, see Account Rights Constants.
Nimm stattdessen CreateProcessWithLogonW:
http://www.michael-puff.de/Developer...thLogonW.shtml