有語法嗎～
Private Declare Function CreateMutex Lib "kernel32" Alias "CreateMutexA" (lpMutexAttributes As SECURITY_ATTRIBUTES, ByVal bInitialOwner As Long, ByVal lpName As String) As Long
Private Type SECURITY_ATTRIBUTES
nLength As Long
lpSecurityDescriptor As Long
bInheritHandle As Long
End Type
Private Const ERROR_ALREADY_EXISTS = 183&
Private Sub Form_Load()
Dim sa As SECURITY_ATTRIBUTES
sa.bInheritHandle = 1
sa.lpSecurityDescriptor = 0
sa.nLength = Len(sa)
Call CreateMutex(sa, 1, App.Title)
If (Err.LastDllError = ERROR_ALREADY_EXISTS) Then
MsgBox "請勿重復運行", , ""
End
End If
End Sub
VB6防多開的寫法
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