使用TextOut函数可以在指定的位置输出文本：
The TextOut function writes a character string at the specified location, using the currently selected font, background color, and text color.

BOOL TextOut(
  HDC hdc,           // handle to DC
  int nXStart,       // x-coordinate of starting position
  int nYStart,       // y-coordinate of starting position
  LPCTSTR lpString,  // character string
  int cbString       // number of characters
);