API 关闭窗口
比如说 我新建了一个MDI窗体，然后有很多子窗体，在MDI内打开后 怎么用API函数关闭打开的子窗口，平常我们用的是UNLOAD ME 怎么用API函数替换这个功能

[解决办法]
使用SendMessage发送关闭命令给它即可

VB code

Private   Declare   Function   SendMessage   Lib   "user32 "   Alias   "SendMessageA "   (ByVal   hWnd   As   Long,   ByVal   wMsg   As   Long,   ByVal   wParam   As   Long,   lParam   As   Any)   As   Long Private   Sub   Command1_Click(Index   As   Integer)   dim   quit   as   long   quit   =   SendMessage(hWnd,   WM_CLOSE,   0,   0) END   Sub