Delete handle of a PLC variable

This sample shows how to delete the handle of a PLC variable:

Visual Basic 6 program

Dim handle As Long

'--- Is called at the start ---
Private Sub Form_Load()
    txtHandle.Text = handle
End Sub

' --- Is called when "Get Handle" is pressed ---
Private Sub btnGetHandle_Click()
    Call AdsOcx1.AdsCreateVarHandle("MAIN.PLCVar", handle)
    txtHandle.Text = handle
End Sub

' --- Is called when "Release Handle" is pressed ---
Private Sub btnReleaseHandle_Click()
    Call AdsOcx1.AdsDeleteVarHandle(handle)
    handle = 0
    txtHandle.Text = handle
End Sub