   HEAP[ForestDemo.exe]: Invalid Address specified to RtlFreeHeap( 018C0000, 01838558 )
  My app run well,but when close the window to stop the app error 'HEAP[ForestDemo.exe]: Invalid Address specified to RtlFreeHeap( 018C0000, 01838558 )' pops out. Development enviroment is visual studio 2005, and the app works before and also works on others pc except mine, where is wrong?   
  It would help if you provided some source code, it would appear that you have corrupted your heap, I suggest you check for double deletes and buffer overrun.   