The FreeLib function unmaps the module from the address space of the calling process and makes the module handle no longer valid.

BOOL FreeLib(
 HMODULE hLibModule 	// handle to loaded library module  
);

Parameters

hLibModule

Identifies the loaded library module. The LoadLib function returns this handle.

Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero.