i could write any program in VC++ (any version) and you will not find the const bytes... i only give a simple masm compiled object - as entry to winmain vc++ function and, your method fill fail..
btw. in manually methods good metgod is to find a GetModuleHandle or a HeapCreare/HeapAlloc in VC, you can user other apis that apper in entry procedure to find OEP manually..