Toolhelp32ReadProcessMemory 

Copies memory allocated to another process into an application-supplied buffer.

BOOL WINAPI Toolhelp32ReadProcessMemory(DWORD th32ProcessID,
    LPCVOID lpBaseAddress, LPVOID lpBuffer, DWORD cbRead,
    LPDWORD lpNumberOfBytesRead);

Parameters

th32ProcessID

Identifier of the process whose memory is being copied. This parameter can be zero to copy the memory of the current process.

lpBaseAddress

Base address in the specified process to read. Before transferring any data, the system verifies that all data in the base address and memory of the specified size is accessible for read access. If this is the case, the function proceeds. Otherwise, the function fails.

lpBuffer

Address of the buffer that receives the contents of the address space of the specified process.

cbRead

Number of bytes to read from the specified process.

lpNumberOfBytesRead

Number of bytes copied to the specified buffer. If this parameter is NULL, it is ignored.

Return Value

Returns TRUE if successful.