memory device context的意思|示意

GDI output functions can be used with a memory device context only if a bitmap has been created and selected into that context.

GDI的输出函数只有当内存设备环境上有了位图画布之后，才能进行输出。

Now let's create a memory device context and select a new bitmap.

现在，让我们创建一个内存设备上下文，然后选择一个新的位图。

When a memory device context is created, GDI automatically selects a 1-by-1 monochrome stock bitmap for it.

当内存设备环境创建后，GDI会自动为它装载一个黑白位图。