设置Windows 8.1屏幕自动旋转代码, Auto-rotate function code

程序代码实现启用或禁用Windows 8.1 Tablet的自动旋转功能

方法一：使用SetDisplayAutoRotationPreferences函数功能

#include <Windows.h>

/*
typedef enum ORIENTATION_PREFERENCE {   
  ORIENTATION_PREFERENCE_NONE              = 0x0,   
  ORIENTATION_PREFERENCE_LANDSCAPE         = 0x1,   
  ORIENTATION_PREFERENCE_PORTRAIT          = 0x2,   
  ORIENTATION_PREFERENCE_LANDSCAPE_FLIPPED = 0x4,   
  ORIENTATION_PREFERENCE_PORTRAIT_FLIPPED  = 0x8
}ORIENTATION_PREFERENCE; 
*/
typedef BOOL (WINAPI *pSDARP)(ORIENTATION_PREFERENCE orientation);
pSDARP pARP;


int main(int argc, char* argv[])
{
  pARP = (pSDARP) GetProcAddress( GetModuleHandle(TEXT("user32.dll")),  
                  "SetDisplayAutoRotationPreferences"); 
  if( pARP ){
    if (atoi(argv[1]) == 0){
      pARP( (ORIENTATION_PREFERENCE)(ORIENTATION_PREFERENCE_LANDSCAPE | ORIENTATION_PREFERENCE_LANDSCAPE_FLIPPED) );
    }
    if (atoi(argv[1]) == 1){
      pARP( (ORIENTATION_PREFERENCE)(ORIENTATION_PREFERENCE_NONE) );
    }

  }else{
    printf("System not supported.\t");
    return 1;
  }
  return 0;
}

方法二：通过写入注册表Enable来设置。1表示启用自动旋转，0为禁止自动旋转

具体Key的位置如下：

KEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\AutoRotation