vb呼叫蜂鳴器製造音階
private declare function beep lib "kernel32" (byval dwfreq as long, byval dwduration as long) as long
private sub command1_click()
playsnd 440, 100
playsnd 494, 100
playsnd 554, 100
playsnd 622, 100
playsnd 698, 100
playsnd 784, 100
playsnd 880, 100
end sub
function playsnd(byval x as long, y as long)
beep x, y * 3
doevents
end function
vb呼叫儲存過程
public sub procexe byval procname as string,byval pch as string dim cn as adodb.connection dim cmd as adodb.command cn.connectionstring cn.open set cm...
vb呼叫vc dll檔案
關於dll的建立與呼叫使用vc 的嚮導即可。具體操作如下 開啟選單 file new 選擇 projects win32 dynamic link library 選擇 a dll project 即可。這時系統會自動生成3個檔案 cpp，stdafx.cpp，stdafx.h。之後將入口函式dll...
VB呼叫儲存過程
dim adocomm as new adodb.command dim prmretval as adodb.parameter dim prmid as adodb.parameter adocomm.activeconnection conn adocomm.commandtype adcmd...