http://www.oschina.net/question/1438716_146566

import win.ui;/*DSG{
   {*/var winform = ..win.form(text="AAuto Form";right=490;bottom=306)winform.add(combobox={cls="combobox";text="combobox";left=108;top=82;right=323;bottom=102;edge=1;items={};mode="dropdown";z=1};static={cls="static";text="static";left=105;top=103;right=318;bottom=261;hide=1;notify=1;transparent=1;z=2})/*}}*/import com;var dataGrid = winform.static.createEmbed("MSFlexGridLib.MSFlexGrid.1"); var gd = dataGrid._object// 初始化界面with gd{	Cols =4 // 列	Rows = 4 //行	setTextMatrix(0,0,"材料编码")	setTextMatrix(0,1,"材料名称")	setTextMatrix(0,2,"规格")	setTextMatrix(0,3,"单位")	}winform.combobox.oncommand = function(id,event){	if(event == 0x7/*_CBN_DROPDOWN*/){		 ::PostMessage(winform.combobox.hwnd, 0x14F/*_CB_SHOWDROPDOWN*/, 0, 0);		 winform.static.hide = 0	}	}winform.show() win.loopMessage();

关键是在cbn_dropdown事件，用PostMessage发送cb_showdropdown消息,用SendMessage发送无效

啥时候用postmessage 或sendmessage 有点饶头？？？