SHELL_Unhook_Properties

include shell.inc
mov eax, GroupID  ; property group identifier
mov esi, OFFSET32 Callback  ; address of callback procedure
VxDcall SHELL_Unhook_Properties

jc  error

Removes the callback procedure from association with the given property group. Uses EAX, ECX, EDX, and Flags.

• Clears the carry flag if successful. Otherwise, sets the carry flag to indicate an error such as an invalid property identifier.

GroupID

Property group identifier. Can be NULL, a valid group ordinal such as GROUP_TASK (as defined in PIF.H), or the address of a null-terminated string specifying the name of a custom PIF group. If GroupID is NULL, the service checks all property groups and removes the callback procedure from each group it is associated with.

Callback

Address of the callback procedure. For more information about the procedure, see SHELL_Hook_Properties.