结合网上的代码，找到了两种全图显示的办法。

第一种是使用GDI+，同样需要使用到picture control，不过这次需要设置属性->杂项->type，选择Owner Draw类型。然后从CStatic类中派生出一个新类：CGdiPlusImgCtrl。重载DrawItem函数来实现绘制图像

可能你觉得使用GDI+麻烦，需要对GDI+环境进行初始化，打包程序又得附带gdiplus.dll。那么我介绍的第二种方法使用GDI就没这么麻烦了。

第一种是使用GDI，同样需要使用到picture control，不过这次需要设置属性->杂项->type，选择Owner Draw类型。然后从CStatic类中派生出一个新类：CGdiImgCtrl。重载DrawItem函数来实现绘制图像

-Combined with the online code, found two ways to display the whole map. The first is to use GDI+, the same need to use the picture control, but the need to set properties->　Miscellaneous->　type, select the Owner Draw type. Then derived from CStatic class in a new class: CGdiPlusImgCtrl. DrawItem function overloading to achieve the image you may feel drawn to use GDI+ trouble, need to initialize GDI+ environment, the program is again packed with gdiplus.dll. Then I use the second method described GDI no such trouble. The first is to use the GDI, the same need to use the picture control, but the need to set properties->　Miscellaneous->　type, select the Owner Draw type. Then derived from CStatic class in a new class: CGdiImgCtrl. Overloaded function to achieve the draw images DrawItem