commit method
Implementation
int commit(int grfCommitFlags) => (ptr.ref.vtable + 8)
.cast<
Pointer<
NativeFunction<Int32 Function(Pointer, Int32 grfCommitFlags)>>>()
.value
.asFunction<
int Function(
Pointer, int grfCommitFlags)>()(ptr.ref.lpVtbl, grfCommitFlags);