Public Function changcolor()
Label1.BackColor = RGB(red() * 255, green() * 255, blue() * 255)
End Function
Public Function color(a As Integer, e As Integer, c As Integer)
Label1.BackColor = RGB(a, e, c)
End Function
Private Sub Timer1_Timer(index As Integer)
Call shuip
Call cz
End Sub
Public Function cz()
Dim chuizhi#
chuizhi = Label1.Height + Label1.Top
If chuizhi >= Form1.ScaleHeight Then
Label1.Top = Label1.Top - 100
chuizhi = 1
Call changcolor
ElseIf Label1.Top <= 0 Then
Label1.Top = Label1.Top + 100
chuizhi = 0
Call changcolor
ElseIf (chuizhi < Form1.ScaleWidth) And chuizhi = 0 Then
Label1.Top = Label1.Top + 100
ElseIf (chuizhi < Form1.ScaleWidth) And chuizhi = 1 Then
Label1.Top = Label1.Top - 100
End If
End Function

call shuip我确实不知道怎么回事

shuip是个函数，你程序中没有定义这个函数，调用怎么可能成功，或者功能有只是函数名打错了，这个得你自己查错

你得先告诉VB shuip是什么东西