WriteProcessMemory

Syntax

BOOL WriteProcessMemory(
  [in]  HANDLE  hProcess,
  [in]  LPVOID  lpBaseAddress,
  [in]  LPCVOID lpBuffer,
  [in]  SIZE_T  nSize,
  [out] SIZE_T  *lpNumberOfBytesWritten
);

WriteProcessMemory function (memoryapi.h) - Win32 appsdocsmsft

Parameters

[in] hProcess

A handle to the process memory to be modified. The handle must have PROCESS_VM_WRITE and PROCESS_VM_OPERATION access to the process.

[in] lpBaseAddress

A pointer to the base address in the specified process to which data is written. Before data transfer occurs, the system verifies that all data in the base address and memory of the specified size is accessible for write access, and if it is not accessible, the function fails.

[in] lpBuffer

A pointer to the buffer that contains data to be written in the address space of the specified process.

[in] nSize

The number of bytes to be written to the specified process.

[out] lpNumberOfBytesWritten

A pointer to a variable that receives the number of bytes transferred into the specified process. This parameter is optional. If lpNumberOfBytesWritten is NULL, the parameter is ignored.