如何知道可执行文件是32-bit还是64-bit

可以使用GetBinaryType API来获得这个信息：

BOOL GetBinaryType(
  LPCTSTR lpApplicationName,
  LPDWORD lpBinaryType
);

Binary Type可以是下面的值。

Value Meaning SCS_32BIT_BINARY A 32-bit Windows-based application SCS_64BIT_BINARY A 64-bit Windows-based application. SCS_DOS_BINARY An MS-DOS – based application SCS_OS216_BINARY A 16-bit OS/2-based application SCS_PIF_BINARY A PIF file that executes an MS-DOS – based application SCS_POSIX_BINARY A POSIX – based application SCS_WOW_BINARY A 16-bit Windows-based application

也可以通过SHGetFileInfo API来获得这个信息，这个API还可以获得更多的文件信息，如各种图标等等，具体可以参看MSDN。

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