A real challenge . . . customizing programs without the source code

I''ve recently written a program that adds some new functionality to an existing off the shelf accounting program. I have no access to the source code of the accounting program. But, by using windows hooks within a DLL I was able to trigger the execution of my program when the user clicked on certain buttons within the accounting program. So, it appears to the user like I have actually modified the original program. I would like to take this to the next level, and add my own buttons/controls to the screen of the accounting program. I''ve used functions like SetWindowsText, to change the text of another windows title bar, and FlashWindowsEx to flash another window. But, is there any way to actually add buttons/controls/menu items to the accounting program screens? I know this sounds kind of crazy, but it never hurts to ask. The other approach I thought to take, would be to create my own window that anchors itself to the accounting program window, and place all the buttons/controls inside of it. Any suggestions, or even crazy far fetched ideas are greatly appreciated. Thanks, Chris In the mood for a little Fun & Games? Check out www.SunAndGames.com Home of Lost Enticer