Is it possible to read process memory of a 64 bit process from a 32bit app?

Question

On windows 64 bit, I\'ve got a 32 bit process that reads the memory of other 32 bit processes, and I\'d like it to be able to read 64 bit processes too.

ReadProcessM

Answer 1

ReadProcessMemory can read any size of memory including from x86 processes reading x64 processes.

You can without a problem, in an x86 program, do the following:

DWORD64 test = 0;
ReadProcessMemory(hProcess, (LPCVOID)lpBaseAddress, &test, sizeof(DWORD64), NULL);

Which would allow you to dereference an x64 pointer from a x86 process.