VBÔõÑùÅжϡ¢·ÀÖ¹³ÌÐòÖØ¸´Ö´ÐÐ
Private Sub Form_load()
'ÅжϳÌÐòÊÇ·ñÒѾÔËÐÐ
If App.PrevInstance
Then
MsgBox "±¾³ÌÐòÒѾÔËÐУ¡", vbInformation Or vbOKOnly, "ÌáʾÐÅÏ¢"
Unload
Me
Exit Sub
End If
'ÒÔÏÂÊÇÖ÷Òª³ÌÐò
' ……
End
Sub
¸½£ºÁíÒ»¸öÀý×Ó£º
Option Explicit
Public Sub CheckExist(fm
As Form) '·ÀÖ¹³ÌÐòÖØ¸´Ö´ÐÐ
Dim title As String
If App.PrevInstance
Then
title = App.title
Call MsgBox("Õâ³ÌÐòÒÑÖ´ÐÐ",
vbCritical)
App.title = "" 'Èç´Ë²Å²»»á Avtivate µ½×Ô¼º
fm.Caption =
""
AppActivate title 'activate ÏÈǰ¾ÍÒÑÔËÐеijÌÐò
End ' ½áÊø
End
If
End Sub
Private Sub Form_Load()
Call
CheckExist(Me)
End Sub
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instar = ctrMSComm.Input '¶ÁͨѶ
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Dim potflag As Integer '±êʶÊÇ·ñÓÃСÊýµã
Dim numcol As Integer ' µã»÷ÔËËã·ûµÄ¸öÊý
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