Dim mX As Long,mY As Long
Const titleHeight = 750 '标题栏高度
 
Private Sub Form_MouseDown(Button As Integer,Shift As Integer,X As Single,Y As Single)
    If Button And vbLeftButton And Y < titleHeight  Then
        mX = X: mY = Y
        Debug.Print X,Y
    End If
End Sub
Private Sub Form_MouseMove(Button As Integer,Y As Single)
    If Button And vbLeftButton And Y < titleHeight  Then
        Me.Move Me.Left - mX + X,Me.Top - mY + Y
    End If
End Sub