Wix C # Custom action not performed at all

Question

I have an installer that has its own screen containing a button. When this button is pressed, a custom action should be performed that checks a few things and returns success or error.

I have my button defined as follows:

<Control Type="PushButton" Id="DatabaseVerifyConnectionButton" X="118" Y="150" Width="116" Height="17" Text="Verify Connection" Property="DATABASEVERIFYCONNECTIONBUTTONPROPERTY" Default="yes">
    <Publish Event="DoAction" Value="VerifyDatabaseConnection">1</Publish>
    <Publish Event="SpawnDialog" Value="VerifySuccessDlg">VERIFIEDCONNECTION = "1"</Publish>
    <Publish Event="SpawnDialog" Value="VerifyFailedDlg">VERIFIEDCONNECTION = "0"</Publish>
</Control>

My custom XML action

<CustomAction Id="VerifyDatabaseConnectionCA"
                BinaryKey="DatabaseCustomAction.CA.dll"
                DllEntry="VerifyDatabaseConnection2"
                Execute="immediate"
                Return="check"/>

<CustomAction Id='VerifyDatabaseConnection'
    Property='VerifyDatabaseConnectionCA'
    Execute='immediate'
    Value="ServerIP=[DATABASESERVERIPTEXTBOXPROPERTY];Username=[DATABASEUSERNAMETEXTBOXPROPERTY];Password=[DATABASEPASSWORDTEXTBOXPROPERTY]"/>

My custom action C # code:

    [CustomAction]
    public static ActionResult VerifyDatabaseConnection(Session session)
    {
        System.Diagnostics.Process.Start(@"C:\Windows\System32\calc.exe");

        return ActionResult.Failure;
    }

The logs show the following:

MSI (c) (58:B4) [16:39:45:183]: Doing action: VerifyDatabaseConnection
Action 16:39:45: VerifyDatabaseConnection. 
Action start 16:39:45: VerifyDatabaseConnection.
Action ended 16:39:45: VerifyDatabaseConnection. Return value 1.

I've tried a lot. Attaching a debugger does not work. Returning success or failure does not seem to matter. Damn, it doesn't even launch the calculator when you press the button. I noticed that changing the entry point for a custom action does not matter at all.

- MakeSfxCA.exe, , . , Visual Studio , Custom Action , .

. ? , .

Answer 1

<CustomAction Id="VerifyDatabaseConnectionCA"
                    BinaryKey="DatabaseCustomAction.CA.dll"
                    DllEntry="VerifyDatabaseConnection2"
                    Execute="immediate"
                    Return="check"/>

DLLEntry "VerifyDatabaseConnection2", "VerifyDatabaseConnection" ( 2, ).

, "VerifyDatabaseConnectionCA" "VerifyDatabaseConnection".