winapi - C++ ReadProcessMemory is Inconsistant -

i've used cheat engine retrieve base address value want change in memory in c++ program.

the address is:

base address: "threadstack0"-0000032c // threadstack0 exe file believe offset 1:     0x12e0 offset 2:     0x130 offset 3:     0xf00 offset 4:     0x500 offset 5:     0x298 

i have following c++ code calculate base address:

uint_ptr modulehandle = (uint_ptr)getmodulehandle(null); uint_ptr addr = modulehandle - 0x32c; addr += 0x12e0; addr += 0x130; addr += 0xf00; addr += 0x500; addr += 0x298;  if (!readprocessmemory(hprocess, (lpvoid)addr, &powerup, sizeof(powerup), null)) {     cout << "failed read process memory" << endl; } else {     cout << "read process memory successfully" << endl; } 

i run it, , 1 out of 10 times, have success. rest of time readprocessmemory fails.

why readprocessmemory inconsistant it's success? nothing on computer, keep running program , works, doesn't.

i pretty sure it's not fault of readprocessmemory, rather getmodulehandle(null) culprit. i'm not sure on how getmodulehandle works exactly, i'm guessing times works, when uses process memory address accessed last? , program runs findwindowa why works. , when doesn't work, that's because process's memory address accessed/changed between program calling findwindowa , getmodulehandle.

something along lines?

is there solution make program consistant in getmodulehandle(null) , readprocessmemory?