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Help with Buffers! Paddy1-Dec-02 2:09 Paddy 1-Dec-02 2:09  Hi, I hope someone can solve this problem for me please! I have a program in C for recording raw audio samples from the souncard into a buffer in the memory. It compiles and runs perfecty in visual studio. However when I copy the code into a VC++ program it complains about all the memory commands like malloc, realloc ect. Maybe I have to include some .lib file?? Here is some of the code that is causing the problem: static PBYTE pBuffer1, pSaveBuffer;<br /> <br /> <br /> <br /> pBuffer1 = malloc (INP_BUFFER_SIZE) ; error C2440: '=' : cannot convert from 'void *' to 'PBYTE' pWaveHdr1->lpData = pBuffer1 ; error C2440: '=' : cannot convert from 'PBYTE' to 'LPSTR' pSaveBuffer = realloc (pSaveBuffer, 1) ; error C2440: '=' : cannot convert from 'void *' to 'PBYTE' Any ideas? Thanks in advance, Paddy. Re: Help with Buffers! markkuk1-Dec-02 2:37 markkuk 1-Dec-02 2:37  You need to cast the pointers to correct type, e.g. pBuffer1 = (PBYTE) malloc(INP_BUFFER_SIZE); Re: Help with Buffers! Paddy1-Dec-02 2:53 Paddy 1-Dec-02 2:53  Thanks problem solved! Re: Help with Buffers! slt1-Dec-02 11:57 slt 1-Dec-02 11:57  I think you need to use casting - as follows: pBuffer1 = (PBYTE) malloc (INP_BUFFER_SIZE) ; pWaveHdr1->lpData = (LPSTR) pBuffer1 ; pSaveBuffer = (PBYTE) realloc (pSaveBuffer, 1) ; That should solve the compiler errors. Scott Re: Help with Buffers! Anonymous1-Dec-02 11:57 Anonymous 1-Dec-02 11:57  I think you need to use casting - as follows: pBuffer1 = (PBYTE) malloc (INP_BUFFER_SIZE) ; pWaveHdr1->lpData = (LPSTR) pBuffer1 ; pSaveBuffer = (PBYTE) realloc (pSaveBuffer, 1) ; That should solve the compiler errors. Scott Changing priority in a priority queue pankajdaga1-Dec-02 1:53 pankajdaga 1-Dec-02 1:53  Hi, I am using an STL priority queue for an application. However, I want to change priorities of the entry at run-time. What is the best way to do this? Anyone know of any good resource that deals with this? Thanks, Pankaj Without struggle, there is no progress how can i serialize a tree struct using c++. not use mfc ttzzgg_807131-Dec-02 1:04 ttzzgg_80713 1-Dec-02 1:04  thank u! Re: how can i serialize a tree struct using c++. not use mfc Christian Graus1-Dec-02 2:43 Christian Graus 1-Dec-02 2:43  Recursively. 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: how can i serialize a tree struct using c++. not use mfc ttzzgg_807131-Dec-02 2:57 ttzzgg_80713 1-Dec-02 2:57  can u t ell me more detail. such as find who is parent and who is child Re: how can i serialize a tree struct using c++. not use mfc Christian Graus1-Dec-02 9:41 Christian Graus 1-Dec-02 9:41  Well, if you're recursing down every branch, then the parent is the one you just found before this one, and the child is the one you find next. Clearly if you want to rebuild a tree that you've saved to disk, you need to save not just the data, but tokens that tell you where the data goes. 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: how can i serialize a tree struct using c++. not use mfc Gary R. Wheeler1-Dec-02 5:19 Gary R. Wheeler 1-Dec-02 5:19  Seems like lots of kids waited until the end of the holiday weekend to do their homework. Software Zen: delete this; Re: how can i serialize a tree struct using c++. not use mfc Ravi Bhavnani1-Dec-02 6:39 Ravi Bhavnani 1-Dec-02 6:39  /ravi Let's put "civil" back in "civilization" http://www.ravib.com ravib@ravib.com Re: how can i serialize a tree struct using c++. not use mfc ttzzgg_807131-Dec-02 7:59 ttzzgg_80713 1-Dec-02 7:59  faint! Re: how can i serialize a tree struct using c++. not use mfc Paul Ingles1-Dec-02 7:15 Paul Ingles 1-Dec-02 7:15  Not sure if this has been mentioned before ... Dictionary's definition of recursion: See Recursion -- Paul "If you can keep your head when all around you have lost theirs, then you probably haven't understood the seriousness of the situation." - David Brent, from "The Office" MS Messenger: paul@oobaloo.co.uk Sonork: 100.22446 Re: how can i serialize a tree struct using c++. not use mfc devvvy1-Dec-02 10:18 devvvy 1-Dec-02 10:18  i assume yr tree is just a link list. u have to arrange all items in a consecutive chunk of memory before u attempt to serialize them. and each item should have some sort of ID to identify itself (example: nLevelID - to identify the depth of an item relative to root node, nItemID - identify the relative position of an item within a given level). This is necessary so that we u read back this memory from disk, u can interpret the memory and locate individual items and reconstruct the tree. good lcuk norm How do I ROTATE rectangels in a View? doruA30-Nov-02 21:59 doruA 30-Nov-02 21:59  I wrote an MFC Draw application that allows the user to draw a Line and a Rectangle. I am trying to implement 'ROTATE' for the Line and the Rctangle. Does anyone know how to rotate the Bounding Rectangle for the objects??? Doru Re: How do I ROTATE rectangels in a View? Paul M Watt1-Dec-02 7:14 Paul M Watt 1-Dec-02 7:14  The first thing that you will need to do is represent your rectangles as a set of four points rather than two that is done with the RECT structure. The next thing that you do is apply this rotation matrix to each point in your rectangle to rotate it, where A is the angle that you would like to rotate in radians: cos(A) -sin(A) sin(A) cos(A) your final formula will look like this: POINT pt; POINT pt_rotated; pt_rotated.x = pt.x * cos(A) - pt.y * sin(A); pt_rotated.y = pt.x * sin(A) + pt.y * cos(A); This formula is a rotation at the origin. Therefore you will need to translate the points to the origin before you rotate, then after the rotation, translate the points back. Good Luck Build a man a fire, and he will be warm for a day Light a man on fire, and he will be warm for the rest of his life! How do I resize rectangels in a View doruA30-Nov-02 21:59 doruA 30-Nov-02 21:59  I wrote an MFC Draw application that allows the user to draw a Line and a Rectangle. I am trying to implement 'RESIZE' for the Line and the Rctangle. Does anyone know how to resize the Bounding Rectangle for the objects??? Doru Re: How do I resize rectangels in a View Stephane Rodriguez.30-Nov-02 22:34 Stephane Rodriguez. 30-Nov-02 22:34  I strongly suggest to check out a sample called DrawCli (MSDEV CD samples). Re: How do I resize rectangels in a View zhdleonid1-Dec-02 5:04 zhdleonid 1-Dec-02 5:04  do you have the doc for the DrawCli ? i feel good. Re: How do I resize rectangels in a View Stephane Rodriguez.1-Dec-02 5:22 Stephane Rodriguez. 1-Dec-02 5:22  zhdleonid wrote: do you have the doc for the DrawCli ? what do you mean by doc? That's a sample source code, so the doc is the source code. And the debugger breakpoints come to the rescue for tiny details. Toolbar bitmap S O S30-Nov-02 21:50 S O S 30-Nov-02 21:50  How can I have a toolbar bitmap with more than 16 colours? The resource editor doesn't like anything else and wants to "fix" it whenever I try Re: Toolbar bitmap Michael Dunn1-Dec-02 5:44 Michael Dunn 1-Dec-02 5:44  Open the bitmap in the resource editor, view properties, and change the colors to 256. The VC editor doesn't support more than 256, so if you need more colors you'll need to use some other app to create the bitmap. --Mike-- "Adventure. Excitement. A Jedi craves not these things."   -- Silent Bob 1ClickPicGrabber - Grab & organize pictures from your favorite web pages, with 1 click! My really out-of-date homepage Sonork-100.19012 Acid_Helm Re: Toolbar bitmap ttzzgg_807131-Dec-02 8:04 ttzzgg_80713 1-Dec-02 8:04  u can use ms paint app edit it How implements a tab control window dock to any inner side of the window? Yu_Matrix30-Nov-02 21:19 Yu_Matrix 30-Nov-02 21:19  How can I implements a tab control window like in Visual Studio Net. Tab controls can be displayed either horizontally, or vertically and docked to any inner side of the window. Tab items in the tab control window can also be grouped. programming

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