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Re: MFC vs STL containers 13-Oct-01 15:34 13-Oct-01 15:34  Well, I haven't done any empirical tests, but here are a couple of issues you need to consider: 1.) Unless something is terribly wrong, linked lists will be comparable between the two. They are both implemented as doubly-linked lists. 2.) In MFC, CMap is implemented as a hash map, whereas std::map<> has looser constraints on time complexity, and is usually implemented as some sort of binary tree (red-black is a common one). This has all sorts of ramifications, as you might imagine. In essence, do not treat CMap and std::map as representing the same data structure, they do not. If you want an STL-like hash map (which is NOT part of the standard yet), try STLPort 4.5, which works on VC++, and includes a std::hash_map class. 3.) Different STL implementations could have dramatically different performance. The best example I can think of is std::list<>::size(). The standard does NOTsay that this has to be O(1) complexity (only that it should), and in fact, STLPort implements it as O(n). However, the standard Microsoft/Dinkumware STL implementation implements it in O(1) time. So you have to be very careful. I would always use the STL containers, MFC is a decade old antique, which is only useful for user interface work. Personally, I use STLPort 4.5, the standard STL that comes with MSVC is disgusting. Active DEsktop - Methods for testing if it is enabled Jase Jennings13-Oct-01 12:09 Jase Jennings 13-Oct-01 12:09  Hi, I'm having difficulties testing if Active Desktop is enabled. I have so far devised three functions for determining if it is enabled : BOOL CActiveDesktop::IsEnabledInShell() { BOOL bActiveDesktop = FALSE; HWND hWindow; // get the handle of Program Manager window hWindow = FindWindowEx(0, 0, "Progman", ""); // search for its child SHELLDLL_DefView window if(hWindow) { hWindow = FindWindowEx(hWindow, 0, "SHELLDLL_DefView", ""); // finally, search for the Internet Explorer_Server grandchild window if(hWindow) { // if this call returns a non-zero handle, the computer // is using ActiveDesktop if(FindWindowEx(hWindow, 0, "Internet Explorer_Server", "")) { bActiveDesktop = TRUE; } } } return bActiveDesktop; } // This method checks the registry Explorer\ShellState key to determine whether // or not the Active Desktop is currently enabled // The 4th byte is examined. // For NT4 - if the byte is 0x13 it is assumed that Active Desktop is enabled // For W2K - if the byte is 0x73 it is assumed that Active Desktop is enabled // Other - if the byte is 0x63 it is assumed that Active Desktop is enabled BOOL CActiveDesktop::IsEnabledInRegistry() { BOOL bInstalled = FALSE; DWORD dwType; DWORD dwMaxValueData; HKEY hkey; if(this->IsInstalled()) { if(RegOpenKeyEx(HKEY_CURRENT_USER, "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer", 0, KEY_ALL_ACCESS, &hkey) == ERROR_SUCCESS) { // query value first time around to determine length of data if(RegQueryValueEx(hkey, "ShellState", 0, &dwType, 0, &dwMaxValueData) == ERROR_SUCCESS) { LPBYTE pRegBytes = new BYTE[dwMaxValueData]; if(pRegBytes == NULL) { return FALSE; } if(RegQueryValueEx(hkey, "ShellState", NULL, &dwType, pRegBytes, &dwMaxValueData) == ERROR_SUCCESS) { unsigned char desktopMode = *(pRegBytes+4); CString s; s.Format("ShellState is [0x%x][0x%x][0x%x][0x%x][0x%x]", *(pRegBytes), *(pRegBytes+1), *(pRegBytes+2), *(pRegBytes+3), *(pRegBytes+4)); LOG(s); delete[] pRegBytes; CWindowsVersion winVers; if(winVers.IsWindowsNT4()) { if(desktopMode == 0x13) { LOG("Active Desktop Enabled on Windows NT4"); return TRUE; } } else if(winVers.IsWindows2000()) { if(desktopMode == 0x73) { LOG("Active Desktop Enabled on Windows 2000"); return TRUE; } } else { if(desktopMode == 0x63) { LOG("Active Desktop Enabled on Windows 9x / Windows Me"); return TRUE; } } } } } } return FALSE; } // Determine if Active Desktop is enabled. SHGetSettings is apparently // more reliable than IActiveDesktop::GetDesktopItemOptions, which can // report incorrectly during the middle of ApplyChanges! BOOL CActiveDesktop::IsEnabled() { BOOL bResult = FALSE; if(this->IsInstalled()) { typedef ULONG (FAR PASCAL FnShGetSettings)(SHELLFLAGSTATE* pFlagState, DWORD dwFlags); HINSTANCE hLib = ::LoadLibrary(_T("SHELL32.DLL")); if(hLib != NULL) { FnShGetSettings* pfnShGetSettings = (FnShGetSettings*) ::GetProcAddress(hLib, _T("SHGetSettings")); if(pfnShGetSettings != NULL) { SHELLFLAGSTATE sfs; pfnShGetSettings(&sfs,SSF_DESKTOPHTML); bResult = sfs.fDesktopHTML; } ::FreeLibrary(hLib); } } return bResult; } Each of these have worked on different machines at differnet times. Currently on my home machine (win me), NONE of them work - my ShellState 4th byte is 0x61 and all other determinations return FALSE; Any ideas on a FAIL SAFE method of checking this across platforms (or one platform would be a start !) Thanks Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com Re: Active DEsktop - Methods for testing if it is enabled Mukkie14-Oct-01 0:45 Mukkie 14-Oct-01 0:45  Try SHGetSettings with SSF_DESKTOPHTML flag. Re: Active DEsktop - Methods for testing if it is enabled Jase Jennings14-Oct-01 6:04 Jase Jennings 14-Oct-01 6:04  I have, and whats more i quoted it in my code example. It is the third method i have displayed. It isn't a very reliable method. Any other ideas? Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com CTreeCtrl Sara Burns13-Oct-01 11:18 Sara Burns 13-Oct-01 11:18  I have a tree descended from CTreeCtrl displaying text only. I am using CustomDraw to colour the text of items. I find I cannot see the text when the item is clicked. This is most obvious where I have not changed the colour from normal. How do I implement the standard inversion of colour of the text to allow it to be visible. Sara Re: CTreeCtrl Christian Graus13-Oct-01 11:24 Christian Graus 13-Oct-01 11:24  If I understand, when you click on an item, the background goes the same colour as the text ? I'd say because you're drawing the text yourself, you need to check if you're drawing the current selection and change the text colour accordingly. Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. CWebBrowser2 Matt Newman13-Oct-01 10:22 Matt Newman 13-Oct-01 10:22  How would I use this in a Dialog app. I.E. I need to have it navigate to "res://about.html". -Matt Newman -Matt Newman Re: CWebBrowser2 13-Oct-01 10:50 13-Oct-01 10:50  Assuming you have inserted the control into your dialog and let the class wizard build a member variable like m_Browser. m_Browser.Navigate( "res://about.html"); Should do it. Re: CWebBrowser2 Matt Newman13-Oct-01 15:33 Matt Newman 13-Oct-01 15:33  Thanks I couldn't find an appropriate command or whatever. Thanks -Matt Newman -Matt Newman Re: CWebBrowser2 Not Active14-Oct-01 6:49 Not Active 14-Oct-01 6:49  You should be aware that you'll need to adjust your image tags in the resouce based html also. It may not be the best example but you can look here for an ideahttp://www.codeproject.com/soap/xml_html.asp Re: CWebBrowser2 Matt Newman14-Oct-01 9:09 Matt Newman 14-Oct-01 9:09  Yea I figured that out but couldn't get the control to work. -Matt Newman -Matt Newman Tell me about it! 13-Oct-01 10:58 13-Oct-01 10:58  Is it possible to have a HTML page on a dialog when using VC 5.0. Do I need VC 6.0? This CWebBrowser does the job? If not is it possible to have something like a control in wich I would simulate a page(I need to write text and load images), something derived from CView maybe? Thanks in anticipation and less bugs! Re: Tell me about it! Matt Newman13-Oct-01 15:37 Matt Newman 13-Oct-01 15:37  I think basically it is from IE 4+ and is an ActiveX control. I don't know if it will work in VC 5 I would think so. I believe their is a third-party open source browser control project but I don't know much about that. -Matt Newman -Matt Newman Mail client 13-Oct-01 6:11 13-Oct-01 6:11  How do I open default mail client? /Ola Carlsson Re: Mail client Christian Graus13-Oct-01 11:25 Christian Graus 13-Oct-01 11:25  To do what ? If it's to send mail, you can pass mailto: (from memory) into ShellExecute. Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. Re: Mail client Net Guy13-Oct-01 19:30 Net Guy 13-Oct-01 19:30  I think he is looking for the registry keys for the default email client and or browsers. I would be intersted in knowing that too. Re: Mail client 13-Oct-01 23:44 13-Oct-01 23:44  I don't want to send an e-mail. I only want to open the users default mail client. If the user has Netscape, i want netscape mail client to start etc. Hope everybody can interpret my message /Ola Carlsson CLSID's #realJSOP13-Oct-01 4:42 #realJSOP 13-Oct-01 4:42  I want to be able to generate a CLSID, but I always want the first 4 sections (best case) to be the same like so: 51eb18c0-98a7-11d1-83d1-f46705c10000 51eb18c0-98a7-11d1-83d1-f46705c10001 51eb18c0-98a7-11d1-83d1-f46705c10002 51eb18c0-98a7-11d1-83d1-f46705c10003 I need this to happen regardless of the machine's on a network or not. The first four sections should be different for each machine the program is run on as well. Is this possible? To hell with those thin-skinned pillow-biters. - Me, 10/03/2001 Re: CLSID's NormDroid13-Oct-01 5:23 NormDroid 13-Oct-01 5:23  Just dug this up.... "For security reasons, UuidCreate was modified so that it no longer uses a machine's MAC address to generate UUIDs. UuidCreateSequential was introduced to allow creation of UUIDs using the MAC address of a machine's Ethernet card." Norm Almond Chief Technical Architect FS Walker Hughes Limited Re: CLSID's #realJSOP13-Oct-01 5:31 #realJSOP 13-Oct-01 5:31  That might be exactly what I want. Thanks Norm. To hell with those thin-skinned pillow-biters. - Me, 10/03/2001 Re: CLSID's #realJSOP13-Oct-01 5:38 #realJSOP 13-Oct-01 5:38  I can't use that. It needs to be supported under Windows 98 as well. To hell with those thin-skinned pillow-biters. - Me, 10/03/2001 Re: CLSID's #realJSOP13-Oct-01 6:19 #realJSOP 13-Oct-01 6:19  UuidCreateSquential is not defined in the specified header file, and I can't find it anywhere in the VC or sdk source files. To hell with those thin-skinned pillow-biters. - Me, 10/03/2001 Re: CLSID's Anders Molin13-Oct-01 12:01 Anders Molin 13-Oct-01 12:01  It's in Rpcdce.h... - Anders Money talks, but all mine ever says is "Goodbye!" Re: CLSID's #realJSOP13-Oct-01 13:21 #realJSOP 13-Oct-01 13:21  Not in mine... To hell with those thin-skinned pillow-biters. - Me, 10/03/2001 Re: CLSID's Michael Dunn13-Oct-01 7:45 Michael Dunn 13-Oct-01 7:45  but I always want the first 4 sections (best case) to be the same No, because that's not how GUIDs are defined. The first 10 bytes are a counter (number of 100ns intervals since some date long in the past, plus some other stuff to account for daylight savings time changes) and the last 6 bytes are the computer's MAC address (or a synthesized number for machines w/o a network card). So you must not change the last 6 bytes on your own or you risk duplicating a GUID made on another machine. If you can change your requirements so that the first part can be incremented, that's ok. You could then have: 51eb18c0-98a7-11d1-83d1-f46705c10000 51eb18c1-98a7-11d1-83d1-f46705c10000 51eb18c2-98a7-11d1-83d1-f46705c10000 and so on. (This is what the Guidgen util does, BTW.) --Mike-- http://home.inreach.com/mdunn/ "The Earth is doomed." -- Rupert Giles your with and

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