Question

vb编译时出现“编译错误，必选参数”为什么？以下为代码：Private Sub Command1_Click()

Select Case ComboBox.Text
Case Sin
For X = 0 To 15 Step 0.001
Y = Sin(a * X) + b
Dot = DrawDot(X, Y, RGB(0, 255, 0))
Next X
Case Cos
For X = 0 To 15 Step 0.001
Y = Cos(a * X) + b
Dot = DrawDot(X, Y, RGB(0, 255, 0))
Next X
Case Tan
For X = 0 To 15 Step 0.001
Y = Tan(a * X) + b
Dot = DrawDot(X, Y, RGB(0, 255, 0))
Next X
Case Ctn
For X = 0 To 15 Step 0.001
Y = Cot(a * X) + b
Dot = DrawDot(X, Y, RGB(0, 255, 0))
Next X
End Sub
请高手指教！！

Answer 1

NONONO，SIN 和COS 等是VB本身自带的函数，你个SIN VB会认为是语句
如果你改成SIN1那就可以

Answer 2

就是你调用函数时，参数少写了，检查一下你代码里的函数定义