Decrements the block count and enables garbage collection by the Microsoft VM.
int __cdecl GCEnable();
Returns the decremented block count.
When calling a native function from within Java, garbage collection is blocked by default. If the native function call is going to take some time, you can enable garbage collection with this call. However, you should first use the GCFramePush function to allow the garbage collector to track any Java objects that you care about during garbage collection.