This function reads memory in a specified process. The entire area to be read must be accessible, or the operation fails.
At a Glance
| Header file: | Winbase.h |
| Windows CE versions: | 2.0 and later |
Syntax
BOOL ReadProcessMemory( HANDLE hProcess, LPCVOID lpBaseAddress,
LPVOID lpBuffer, DWORD nSize, LPDWORD lpNumberOfBytesRead);
Parameters
hProcess
Handle to the process whose memory is being read. In Windows CE, any call to OpenProcess will return a process handle with the proper access rights.
lpBaseAddress
Pointer to the base address in the specified process to be read. Before any data transfer occurs, 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
Pointer to a buffer that receives the contents from the address space of the specified process.
nSize
Specifies the requested number of bytes to read from the specified process.
lpNumberOfBytesRead
Pointer to the actual number of bytes transferred into the specified buffer. If lpNumberOfBytesRead is NULL, the parameter is ignored.
Return Values
Nonzero indicates success. Zero indicates failure. To get extended error information, call GetLastError.
The function fails if the requested read operation crosses into an area of the process that is inaccessible.
Remarks
ReadProcessMemory copies the data in the specified address range from the address space of the specified process into the specified buffer of the current process. The process whose address space is read is typically, but not necessarily, being debugged.
The entire area to be read must be accessible. If it is not, the function fails as noted previously.
See Also