vba - Excel VBA : Is it possible create custom functions with custom methods?

Question

我指的是，例如，你可以如何做:

Range().Select

其中“Range()”是函数，“Select”是方法。

例如，如果我有一个函数，我想采用三个代表三角形边长的 double ，并以任一弧度表示最大角度。

Public Function getAngle(a as Double, b as Double, c as Double)

    .degrees = 'some equation to determine degrees as a double
    .rads = 'some equation to determine radians as a string

End Function

因此，您将得到以下结果:

getAngle(3, 4, 5).度:90.0

getAngle(3, 4, 5).rads : "0.5π"

Answer 1

创建一个类，在此示例中将其命名为 clsTrig。

Option Explicit

'/ Class  Name : clsTrig

Private m_ddegrees   As Double
Private m_drads  As Double

Public Property Get degrees() As Double
    degrees = m_ddegrees
End Property

Public Property Let degrees(val As Double)
     m_ddegrees = val
End Property

Public Property Get rads() As Double
    rads = m_drads
End Property

Public Property Let rads(val As Double)
     m_drads = val
End Property


Public Function doCalc(a1 As Double, a2 As Double) As Double

    '/ You do the math here. This is just a sample and not actual trigonometery

    m_ddegrees = a1 + a2
    m_drads = a1 - a2


End Function

然后在标准模块中，您将获得所需的行为，如下所示:

Public Function getAngle(a As Double, b As Double) As clsTrig
    Dim oTrig As New clsTrig

    Call oTrig.doCalc(a, b)
    Set getAngle = oTrig
End Function

Sub test()
    MsgBox getAngle(30, 20).degrees
    MsgBox getAngle(30, 20).rads
End Sub