计算PE文件校验和

DWORD MapFileAndCheckSum(
  _In_  PTSTR  Filename,
  _Out_ PDWORD HeaderSum,
  _Out_ PDWORD CheckSum
);
PIMAGE_NT_HEADERS CheckSumMappedFile(
  _In_  PVOID  BaseAddress,
  _In_  DWORD  FileLength,
  _Out_ PDWORD HeaderSum,
  _Out_ PDWORD CheckSum
);