C / C++ / MFC

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urgently required Shanmukh2-Jan-04 19:06 Shanmukh 2-Jan-04 19:06  I am doing some work so the screen designer works with any type of derived window classes, Dialog, Property Pages, etc. I am working on storing the actual definition in a database or XML file so that changes that are made to the screens are permanent and returned when the application is next run. Controls can be configured to retrieve and save data from database field so users can decide at runtime where the data for a newly created control should be loaded and saved from. i want code in VC++ Re: urgently required l a u r e n2-Jan-04 21:31 l a u r e n 2-Jan-04 21:31  i assume u mean ur designing a new windowing system of some sort ... that usually implies that YOU will be writing the code not asking us to do it for you ... unless u are a project manager without any programmers that is why dont u be a bit more specific in your questions and u might get a bit of help have a nice day now... "there is no spoon" biz stuff   about me urgently required shanmuk2-Jan-04 19:03 shanmuk 2-Jan-04 19:03  I am doing some work so the screen designer works with any type of derived window classes, Dialog, Property Pages, etc. I am working on storing the actual definition in a database or XML file so that changes that are made to the screens are permanent and returned when the application is next run. Controls can be configured to retrieve and save data from database field so users can decide at runtime where the data for a newly created control should be loaded and saved from. i want code in VC++ COM errors Prakash Nadar2-Jan-04 18:41 Prakash Nadar 2-Jan-04 18:41  i am using third party COM component... I have put them in try catch block for any com error.. by using _com_error i am able to retrive the error code and error message... But i want to filter out some of the error code say 0x80004005 (unexpected error). When this error occurs i just handle the error gracefully without notifying the user of the actual cause. My question is.. Is there any #define for 0x80004005 like #define COM_UNEXPECTED 0x80004005 so that i can use it in my switch case like switch(ce.Error()) { case COM_UNEXPECTED: .... default: ... } now my switch looks like this switch(ce.Error()) { case 0x80004005: .... default: ... } I know that i can #define it myself but i looking for the one that is already defined. Thank You. My God is more powerfull Than Your God. (the line that divides the world) Re: COM errors Abhishek Srivastava2-Jan-04 18:56 Abhishek Srivastava 2-Jan-04 18:56  Hi Mr Prakash! actually yes, u dont need to make one more #define as one already exist there /**** MessageId: E_FAIL MessageText: Unspecified error #define E_FAIL _HRESULT_TYPEDEF_(0x80004005L) ***/ so instead of using that not so gud luking figure 0x80004005 u can smiply use better luking "E_FAIL" for this purpose I hope ur prob is solved Abhishek Srivastava Software Engineer (VC++) India ,Noida Mobile no 9891492921 Re: COM errors Prakash Nadar2-Jan-04 19:22 Prakash Nadar 2-Jan-04 19:22  Yeah you solved my prob, thanx a lot. My God is more powerfull Than Your God. (the line that divides the world) radio button states coda_x2-Jan-04 16:54 coda_x 2-Jan-04 16:54  i have 2 radio buttons grouped together, variable name is m_button, when i checked the .cpp file, m_button =-1 (initialized). How do i detect which button has been checked? if i use: if(m_button!=-1) then this means can be button a or button b but i want to detect specifically either one. anyone can clarify? thanx Re: radio button states l a u r e n2-Jan-04 18:23 l a u r e n 2-Jan-04 18:23  radio buttons are weird they actually get put into an array in effect so the value u get back is the zero-based index of the radio button within the group (as far as i recall) "there is no spoon" biz stuff   about me Re: radio button states Ravi Bhavnani2-Jan-04 22:28 Ravi Bhavnani 2-Jan-04 22:28  Use separate CButton members for each radio button. Then test this condition: m_checkButton_1.GetCheck() == BST_CHECKED to see if it's checked. /ravi Let's put "civil" back in "civilization" Home | Articles | Freeware | Music ravib@ravib.com Re: radio button states Selvam R2-Jan-04 22:55 Selvam R 2-Jan-04 22:55  Hi, I think radio buttons with in group box ( privious one) is better then separate CButton members for each radio button. Correct!!? With Regards, R.Selvam Re: radio button states Ravi Bhavnani3-Jan-04 6:05 Ravi Bhavnani 3-Jan-04 6:05  I prefer to use individual (CWnd derived) members for each controls. That gives me complete control over my GUI and would also address your issue. /ravi Let's put "civil" back in "civilization" Home | Articles | Freeware | Music ravib@ravib.com Re: radio button states Prakash Nadar3-Jan-04 0:10 Prakash Nadar 3-Jan-04 0:10  There are good tutorials on radio button on CP you can check them out. My God is more powerfull Than Your God. (the line that divides the world) Re: radio button states asierra13-Jan-04 14:08 asierra 13-Jan-04 14:08  m_button =-1 "None Checked" m_button = 0 "button a Checked" m_button = 1 "button b Checked" The difference between TRUE and true shultas2-Jan-04 15:09 shultas 2-Jan-04 15:09  Hello all. I am just wondering, sometimes I see things such as: m_ListBox.ShowWindow(TRUE); and other times I see: m_ListBox.ShowWindow(true); I am just wondering if there is any difference between TRUE and true / FALSE and false or if they both mean the same thing? (ie constants with the same value) Re: The difference between TRUE and true Jörgen Sigvardsson2-Jan-04 15:22 Jörgen Sigvardsson 2-Jan-04 15:22  the difference is that TRUE is a #define and true is a constant, very much like any integer 1, 2, 3, 23423. TRUE happens to evaluate to 1, and the integer representation of true is 1, hence you can use them interchangably. But one should always strive to "put the round ball into the round hole, and not the square hole". -- They say the most horrible things, but I hear violins. When I close my eyes, I'm at the center of the sun. Re: The difference between TRUE and true Michael Dunn2-Jan-04 16:15 Michael Dunn 2-Jan-04 16:15  bool is a C++ built-in type with two possible values, true and false. Nothing else. BOOL is something MS made up for use in Windows and MFC. They needed a boolean type that worked in C and C++, and since they did this before bool was added to C++, they couldn't just reuse bool. BOOL is defined as: typedef int BOOL; #define FALSE 0 #define TRUE 1 The trouble with those definitions is that the BOOL notion of "true" is not 1 but non-zero. A function that returns a BOOL may return 1 to mean "true", or some other nonzero number (I've seen it myself, can't recall the API names off-hand though). Because of that, you should never test a BOOL variable/function against TRUE, just test as a boolean and the language rules will take care of the rest. You should, in general, use bool for your own code, assuming it's C++. You can pass a bool to a function expecting a BOOL because the bool gets promoted automagically by the language rules to the integer 0 or 1, for false or true respectively, which satisfies the definition of BOOL. --Mike-- Ericahist | CP SearchBar v2.0.2 | Homepage | 1ClickPicGrabber New v2.0! | RightClick-Encrypt If my rhyme was a drug, I'd sell it by the gram. Re: The difference between TRUE and true Hauptman(n)3-Jan-04 5:16 Hauptman(n) 3-Jan-04 5:16  afaik is BOOL an unsigned int, but thats not very important scio me nihil scire My OpenSource(zlib/libpng License) Engine: http://sourceforge.net/projects/rendertech Its incurable, its a Pentium division failure. Re: The difference between TRUE and true Michael Dunn3-Jan-04 6:48 Michael Dunn 3-Jan-04 6:48  windef.h says typedef int BOOL; --Mike-- Ericahist | CP SearchBar v2.0.2 | Homepage | 1ClickPicGrabber New v2.0! | RightClick-Encrypt You cannot truly appreciate Dilbert unless you've read it in the original Klingon. Re: The difference between TRUE and true Hauptman(n)3-Jan-04 8:36 Hauptman(n) 3-Jan-04 8:36  k then it was something other..... scio me nihil scire My OpenSource(zlib/libpng License) Engine: http://sourceforge.net/projects/rendertech Its incurable, its a Pentium division failure. Re: The difference between TRUE and true shultas2-Jan-04 21:31 shultas 2-Jan-04 21:31  Gotcha! Thanks for the replies, that explained it perfectly! How to select a folder in VC .NET shultas2-Jan-04 13:32 shultas 2-Jan-04 13:32  Hello all. A little preface, I'm really new at programming with Visual C++. I've just installed VS .NET on my machine and have purchased a few books. I have finally gotten down the CFileDialog class and I can use it to select a file with ease. I am wondering if there is a similar way to select a folder/directory? I have searched for quite some time (I usually search for at least 30-90 minutes or more before I post a message here), and cannot find anything to help me. I've found a DirPkr class, but it appears it was written for VC++ 6 and there are about 50 errors when I compile in VC .NET, and I'm not advanced enough to know what the problems are. I was wondering if there was an easy class out there for VS .NET (or a way to easily adapt CFileDialog, or maybe another class in MFC to do this?) I've searched the MSDN site too but cannot find anything. I am getting better at wording my searches though Thanks! Shultas Re: How to select a folder in VC .NET Gary R. Wheeler2-Jan-04 14:02 Gary R. Wheeler 2-Jan-04 14:02  There is a shell function called SHBrowseForFolder that does this. There is an article here[^] about a wrapper for it that may give you some hints. Software Zen: delete this; Re: How to select a folder in VC .NET shultas2-Jan-04 14:22 shultas 2-Jan-04 14:22  BINGO! THANK YOU! (yep, i'm shouting That's exactly what I was looking for and this example there worked great. Sometimes I just sit there and enter a bunch of phrases into the search box "select folder" "pick folder" "choose folder" and I usually find what I'm looking for. This time, none of the choices that I used yielded a result. Thanks for the quick reply. I will be able to sleep tonight. Oh wait, it's only 8:30, that means I've got 8 more hours to play! Re: How to select a folder in VC .NET Michael Dunn2-Jan-04 16:20 Michael Dunn 2-Jan-04 16:20  Take a look at the FAQ too, for example: 4.13 How do I prompt the user to select a directory?[^] --Mike-- Ericahist | CP SearchBar v2.0.2 | Homepage | 1ClickPicGrabber New v2.0! | RightClick-Encrypt If my rhyme was a drug, I'd sell it by the gram. Drawing in layers mirano2-Jan-04 12:48 mirano 2-Jan-04 12:48  Hi guys. I want to draw in layers, so if anybody could give me a hint about that, I would really appreciate it. I want to be able to draw in multiple layers, so for instance if I am to erase a rectangle or any other more complex object, I would only discard a layer and repaint that object as altered, not having to redraw the background or anything else. It is something like in Photoshop when you draw on the layer and you bring it to the front, then you can delete the whole layer at any moment later. I only need a general guidance, not the actual code. Thanks.

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