MFC code always adds some offsets for the controls and window, etc. to the resource ID, so you have to go through a mapping of your resource ID to help ID, and then use the help ID in your help project. Look at the MakeHM.Exe that comes with VC6, or else look for my CGMakeHM utility here at CodeProject - each one performs the mappings. People that start writing code immediately are programmers (or hackers), people that ask questions first are Software Engineers - Graham Shanks

Thank's I will use the "What's this help" by using the html help functionas mentioned in the article: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/htmlhelp/html/vsconovhtmlhelpapioverview.asp[^] what I did is: I took the function: void CMainFrame::HtmlHelp(DWORD_PTR dwData, UINT nCmd) { HWND hwnd = HtmlHelp( GetDesktopWindow), "c:\\Help.chm::/Intro.htm>Mainwin", HH_DISPLAY_TOPIC, NULL) ; CGuiFrameWnd::HtmlHelp(dwData, nCmd); } when I debugged I could enter the CMainFrame::HtmlHelp function after pressing the What`s this arrow and clicking left at any frame or window. Then I found the information to use the HWND hwnd = ... function as mentioned above. Now I get the error HtmlHelp function does not accept 4 parameters. As in the article mentioned the .lib is included and the path for is set. So I have no clue what to do!! Thank`s soo much! Georg

You're welcome. :) I've no idea to recommend the book, instead, you'd better to research many kind of examples in below page. http://www.codeguru.com/Cpp/controls/[^] Enjoy:rose: Anderson Sheen (exteide@gmail.com) The Extension IDE: http://www.exteide.com