VB进程间互访
1、VB ActiveEXE 工程。
2、Form1 + Module1 + Class1
3、Form1 Code

Private Sub Form_Unload(Cancel As Integer)
    Set oClass1 = Nothing
End Sub

4、Module1 Code

Option Explicit
Public oClass1 As Class1

Sub Main()
    Set oClass1 = New Class1 
    Form1.Show
End Sub

5、Class1 Code

Option Explicit
Private mPatientID As String
Private Type GUIDs
    Data1 As Long
    Data2 As Integer
    Data3 As Integer
    Data4(0 To 7) As Byte
End Type

'Declares needed to register object in the ROT (Run Object Table)
Private Const ACTIVEOBJECT_STRONG = 0
Private Const ACTIVEOBJECT_WEAK = 1
Private Declare Function CLSIDFromProgID Lib "ole32.dll" (ByVal ProgID As Long, rclsid As GUIDs) As Long
Private Declare Function CoDisconnectObject Lib "ole32.dll" (ByVal pUnk As IUnknown, pvReserved As Long) As Long
Private Declare Function RegisterActiveObject Lib "oleaut32.dll" (ByVal pUnk As IUnknown, rclsid As GUIDs, ByVal dwFlags As Long, pdwRegister As Long) As Long
Private Declare Function RevokeActiveObject Lib "oleaut32.dll" (ByVal dwRegister As Long, ByVal pvReserved As Long) As Long
Private OLEInstance As Long


Public Property Let PatientID(ByVal Value As String)
    mPatientID = Value
End Property

Public Property Get PatientID() As String
    PatientID = mPatientID
End Property


Public Sub AddToROT()

    Dim mGuid As GUIDs
    Dim lp As Long

    'The magic happens here
    'This code is responsible for creating the entry in the ROT
    'Make sure to insert the correct qualified object (class) that
    'you want in the ROT.
    OLEInstance = 0
    lp = CLSIDFromProgID(StrPtr("Project1.Class1"), mGuid)

    If lp = 0 Then
        lp = RegisterActiveObject(Me, mGuid, ACTIVEOBJECT_WEAK, OLEInstance)
    End If

End Sub

Public Sub RemoveFromROT()

    'Once we are done with the main program, lets clean up the rot
    'by removing the entry for our ActiveX Server/DLL
    If OLEInstance <> 0 Then
        RevokeActiveObject OLEInstance, 0 
 
    End If
    CoDisconnectObject Me, 0

End Sub

Private Sub Class_Initialize()
    AddToROT
    mPatientID = "123456"
End Sub

Private Sub Class_Terminate()
    RemoveFromROT
End Sub

6、编译，生成EXE，运行。
7、Test Code

坐在前排