One annoying behavior of the VB6 IDE editor, especially when switching back to it from more recent tools like VS.NET, is that it doesn't recognize the mousewheel! Maybe VB6 was brought out when most mice didn't have one, but is there a way to fix it so it does recognize the mousewheel?
Microsoft has an extension that can provide the behavior requested. You have to download it from the link below and register it with the steps provided, such as using regsvr32
Update: Here are the steps
Download the VB6 Mouse Wheel.exe file that includes the add-in DLL and the code that is used to create the add-in DLL.
Extract the files to a location you have access to.
Open a command prompt, run as administrator.
Go to the folder you extracted the files to.
type regsvr32 VB6IDEMouseWheelAddin.dll, and then click OK
Start Visual Basic 6.0. Click Add-Ins, and then click Add-in Manager.
In the Add-in Manager list, click MouseWheel Fix.
Click to select the Loaded/Unloaded check box, and then click to select the Load on Startup check box.
Click OK.