Simple GUI test

[Walter Bright]

smithfox wrote:
> I wrote a simple GUI test

Try the sample gui app \dmd\samples\d\winsamp.d

> My questions is:
> 1. What's mean  "Symbol Undefined __acrtused" in above codes.

http://www.digitalmars.com/ctg/acrtused.html

> 2. Whether all GUI program using D must have WinMain function?
> 3. If we can write GUI program without WinMain, how to get 
>     HINSTANCE hInstance,
>     HINSTANCE hPrevInstance,
>     LPSTR lpCmdLine,
>     int nCmdShow
> ??