获取系统任务栏位置宽高信息的方法

获取系统任务栏位置宽高信息的方法  

void GetTaskbarInfo(int &width, int &height, int &pos)
{//获取系统任务栏状态位置有四种情况：左、上、右、下，此外要考虑任务栏自动隐藏的情况
 int wx = GetSystemMetrics(SM_CXSCREEN);
 int wy = GetSystemMetrics(SM_CYSCREEN);
 CRect rtWorkArea;
 SystemParametersInfo(SPI_GETWORKAREA, 0, &rtWorkArea, 0);
 //1.任务栏停靠在左边情况
 if (0!=rtWorkArea.left)
 {
  width = wx - rtWorkArea.Width();
  height = wy;
  pos = 0;
  return;
 }
 //2.任务栏停靠在上边情况
  if(0!=rtWorkArea.top)
  {
   width = wx;
   height = wy - rtWorkArea.Height();
   pos = 1;
   return;
  }
 //3.任务栏停靠在右边情况
  if(0==rtWorkArea.left && wx!=rtWorkArea.Width())
  {
   width = wx - rtWorkArea.Width();
   height = wy;
   pos = 2;
   return;
  }
 //4.任务栏停靠在下边情况
  if(0==rtWorkArea.top && wy!=rtWorkArea.Height())
  {
   width = wx;
   height = wy - rtWorkArea.Height();
   pos = 3;
   return;
  }
  //5.任务栏自动隐藏的情况，这样其宽高都是0
  if(0==rtWorkArea.left && 0==rtWorkArea.top 
   && wx==rtWorkArea.Width() && wy==rtWorkArea.Height())
  {
   width = 0;
   height =0;
   pos = 4;
   return;
  }
}