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Window position S O S15-Nov-02 23:31 S O S 15-Nov-02 23:31  How can I position a window to the bottom of a MDI client window, but above any statusbars/toolbars it has down there? I got it done up to the part about client window, but the status/toolbars... no idea I'm using MFC. Re: Window position Gary R. Wheeler16-Nov-02 2:56 Gary R. Wheeler 16-Nov-02 2:56  Hmmm. Using the MDI client window as a starting point, enumerate the client's child windows using EnumChildWindows, find the position of the free space within the client area from the positions of the child windows (which should include status and tool bars). Software Zen: delete this; simple COM server - two questions. devvvy15-Nov-02 22:53 devvvy 15-Nov-02 22:53  QUESTION 1: How do I deallocate the memory for input/output BSTRs from a VB client? ASP client? I cannot call SysFreeAlloc(...) from anywhere except in a C++ client. Here's the idl for the method exposed by the interface: [id(1), helpstring("method GenQuery")] HRESULT GenQuery([in] BSTR bstrParam, [out, retval] BSTR * bstrSQL); QUESTION 2: Do I need to Destroy my COM server object/instance? It's an inprocess dll-Apartment(both) ATL COM server. Here's code for a VB client: Private Sub btnQueryGen_Click() Dim objQueryGen As QUERYGENALPHALib.QueryGenerator Set objQueryGen = New QueryGenerator Dim strSQL As String strSQL = objQueryGen.GenQuery(Me.txtParam.Text) Me.txtSQLQuery.Text = strSQL 'I cant objQueryGen = Nothing (runtime error 438: Object does not support this method or property) End Sub QUESTION 3 - destroy COM server? What about from ASP? norm Re: simple COM server - two questions. Christian Graus15-Nov-02 23:27 Christian Graus 15-Nov-02 23:27  VB and VBScript handle all of that for you, AFAIK. Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002 Re: simple COM server - two questions. devvvy16-Nov-02 1:16 devvvy 16-Nov-02 1:16  what do u mean? what do u mean that VB.NET will handle all that...? and what's "AFAIK" norm Re: simple COM server - two questions. dabs16-Nov-02 2:34 dabs 16-Nov-02 2:34  All scripting languages will do this for you. And yes, both VB and VB.NET will also. It helps however to clear the reference to your COM object after it has been used but you must use the Set keyword there also: <br /> Set myObject = Nothing<br /> AFAIK : As Far As I Know Wenn ist das Nunstück git und Slotermeyer? Ja! Beierhund das oder die Flipperwaldt gersput! Syntactically, is the keywork "Set" redundant? devvvy16-Nov-02 8:28 devvvy 16-Nov-02 8:28  Syntactically, is the keywork "Set" redundant, u think? norm Re: Syntactically, is the keywork "Set" redundant? Christian Graus16-Nov-02 10:09 Christian Graus 16-Nov-02 10:09  No, VB requires it. Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002 what tool do u use to debug a COM object? devvvy15-Nov-02 22:17 devvvy 15-Nov-02 22:17  hi, just built a simple COM object/server with ATL. It's inprocess-Apartment(both) server. Client is a simple VB application for testing purposes. what's the better way of testing a COM server? ActiveX controller? Any good tutorial? THanks! norm Re: what tool do u use to debug a COM object? Christian Graus15-Nov-02 22:36 Christian Graus 15-Nov-02 22:36  I do this every day at work, my components are called from VBScript, which means that if I attach the debugger to dllhost, I can debug them in VC++. I need to make sure the debug version is registered first, of course. If they are run from a C++ app, the app itself is where the dll is run, so I attach to that. I presume VB would be the same. Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002 Re: what tool do u use to debug a COM object? devvvy15-Nov-02 22:46 devvvy 15-Nov-02 22:46  thanks, how exactly can i do that? any good tutorial? norm Re: what tool do u use to debug a COM object? Christian Graus15-Nov-02 22:57 Christian Graus 15-Nov-02 22:57  Project/Debug/Attach To Process. That's all there is to it, VC will proceed to debug the process you point it to, and then you just load up the files from your COM component and set some breakpoints. Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002 Re: what tool do u use to debug a COM object? Daniel Turini15-Nov-02 22:37 Daniel Turini 15-Nov-02 22:37  I usually test this way: A VB Project1.exe, with a Form1 and a Command1 button If I want to test multi-threaded issues, I do the same with a C# client. My latest article: SQL Server DO's and DONT's[^] Re: what tool do u use to debug a COM object? devvvy15-Nov-02 22:41 devvvy 15-Nov-02 22:41  whoa, C#? this is sooo funky. yes, i'm using a VB client with a good old Command1 button. But i can step into the dll or exe code then. is there a better method? and yes, if multithreaded, it becomes all the more a bitch... thanks norm Re: what tool do u use to debug a COM object? ian mariano16-Nov-02 8:45 ian mariano 16-Nov-02 8:45  You can, in the "debug" settings for you app, tell it to launch vb.exe, set breakpoints and you're on your way. Alternately, you can attach to the VB process, then launch your client. "The greatest danger to humanity is humanity without an open mind."   - Ian Mariano - http://www.ian-space.com/ COM - data types. confusing. devvvy15-Nov-02 21:39 devvvy 15-Nov-02 21:39  QUESTION 1: are they the same? LPSTR and char * QUESTION 2: and what the heck is OLECHAR? QUESTION 3: I cant find the documentation for: a. OLECHAR b. LPSTR QUESTION 4: _TEXT() _T() QUESTION 5: if char is a Automation compliant data type, then why BSTR? and why Variant? Thanks! norm Re: COM - data types. confusing. Christian Graus15-Nov-02 21:50 Christian Graus 15-Nov-02 21:50  norm wrote: what the heck is OLECHAR? It's a macro which in a Unicode build places an L next to the string like this L"this is my value"; This has the effect of creating a Unicode string. LPSTR is a long pointer to a string, I believe it's the same as char *. Microsoft like to 'create' types with MACRO's, I guess that means they can change them later ( like WPARAM and LPARAM ). norm wrote: _TEXT() _T() Never seen them before. Looks to me like member variables on an example string class in MSDN. They sometimes use _ instead of m_. norm wrote: if char is a Automation compliant data type, then why BSTR? and why Variant? A BSTR is a wide string, you'd set one with the L from OLECHAR above, otherwise you get a char *. A _bstr_t wraps both types for you. A VARIANT is a whole different kettle of fish, it carries a lot more than just strings. Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002 Re: COM - data types. confusing. Anonymous15-Nov-02 22:06 Anonymous 15-Nov-02 22:06  norm wrote: QUESTION 1: are they the same? LPSTR and char * That's the same. LPSTR is preferred if you want to minimize the * in the signatures (it's more object-like). norm wrote: QUESTION 2: and what the heck is OLECHAR? OLECHAR = WCHAR = 16-bits = UCS2 = Unicode (the OS uses unicode strings internally). norm wrote: QUESTION 3: I cant find the documentation for: a. OLECHAR b. LPSTR look in <wtypes.h> norm wrote: QUESTION 4: _TEXT() _T() see <tchar.h> This macro produces either a simple char* string or a WCHAR* string depending on whether you are compiling in "normal" mode (SBCS, DBCS, MBCS), or in UNICODE. Use it instead of L"xxxx" which always produces a WCHAR* string regardless of the compilation mode. Using _T(x) is also a good idea to remind yourself where are the hardcoded strings (internationalisation). norm wrote: QUESTION 5: if char is a Automation compliant data type, then why BSTR? and why Variant? BSTR is an all-in-one string : Unicode, content itself, length. A char* is not a typed string (can you figure out the codepage in it ? Answer = no). A char* does not have the length embedded (you could do a _tcslen(string) on it, provided it ends with a 0, etc., etc. ==> Many issues with a char* VARIANT is a C-union struct. Introduced mostly because of VB (which hides all the type mapping for you) and other automation languages. Re: COM - data types. confusing. Michael Dunn16-Nov-02 4:52 Michael Dunn 16-Nov-02 4:52  I cover all this in my string articles: part 1 and part 2. --Mike-- "alyson hannigan is so cute it's crazy" -- Googlism Just released - 1ClickPicGrabber - Grab & organize pictures from your favorite web pages, with 1 click! My really out-of-date homepage Sonork-100.19012 Acid_Helm Re: COM - data types. confusing. devvvy16-Nov-02 8:21 devvvy 16-Nov-02 8:21  thanks mike, will read them now. norm norm Float Data TRae15-Nov-02 20:34 TRae 15-Nov-02 20:34  How do you get Visual C++.NET to recognize float data less than zero? For instance, if the following were typed: float someint=(9/12); The program sees this as zero and not 0.75. Re: Float Data Chris Losinger15-Nov-02 20:41 Chris Losinger 15-Nov-02 20:41  put decimal points after the 9 and 12 -c A conclusion is simply the place where someone got tired of thinking. Smaller Animals Software Re: Float Data Michael Dunn15-Nov-02 21:04 Michael Dunn 15-Nov-02 21:04  9 and 12 are both integers, so that expression does integer division, thus the result is zero. Write it with floating-point constants: 9.0/12.0 to get the desired result. --Mike-- "alyson hannigan is so cute it's crazy" -- Googlism Just released - 1ClickPicGrabber - Grab & organize pictures from your favorite web pages, with 1 click! My really out-of-date homepage Sonork-100.19012 Acid_Helm CTabCtrl and CListView Luke Murray15-Nov-02 19:52 Luke Murray 15-Nov-02 19:52  hey everyone, i'm fairly new to MFC so forgive me if this is easy, but my View class is a CListView(in report mode) and i follow some i examples i found to get tabs working, by having a member varible in the View class and setting up the tabs in the view classes OnInitialUpdate, and now i have tabs but the header on the ListView apear over the tabs, which i want the list view to look like its in the tabs. any ideas? should my View class be derived from tab class and create a ListView class in it? not the other way around? i tried a quick hack at that but got errors, but if that was right i'll have another go. maybe i could make it draw the listview lower? anyway thanks in advance. Luke. Where can I find MEPG4 encode/decode samples? George215-Nov-02 19:43 George2 15-Nov-02 19:43  Hi, everyone! I am a newbie of MPEG4. First, I want to learn what is MPEG4. Then I want to write a simple MPEG4 encoder/decoder. (Using C++) But I can not find any documents and samples at hand. Anyone know how can I find the resources? (1. A step by step doc for newbie of MPEG4.) (2. A simple encoder/decoder sample code.) Thanks & nice weekend, George

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