The dialog ignores this value which it passes as a parameter to the change callback function. The change callback function can return a status code to the code that invoked the dialog box if a pointer to a status variable is passed for this parameter. Pointer to a help information structure that is referenced when the user enters the Help button on the dialog box. MustBeZero Set to zero. The function returns a non-zero value on failure.
Failure is returned if the security context is invalid for example.
This function pops up a system ACL editor dialog box. Set to 0. This is the instance handle of the application that will be associated with the dialog box. Specify NULL for the local machine. AclDlgControl Points to a caller supplied ACL dialog control data structure.