i suggest "Object oriented programming in C++" by Bjorn Strotustrup
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Alan Ingleby Sent: Tuesday, March 18, 2003 3:49 PM To: Palm Developer Forum Subject: Re: Writing a char* to the database There are several faults with the code you list below. All of them point to a lack of understanding of some fundemental C concepts, particularly pointers. I would suggest you read a good C book, or a tutorial on the web. Sorry to seem harsh, but the issues you raise are not really related to PalmOS programming. Alan PS:(I've placed a few /**/ comments in the code below, to "point" you in the right direction...) "Blackwell Chris A Maj CENTAF-PSAB/C3 TCT Attack Coordinator" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > > Simple question... > > I want a dynamic List box that I get entries for from a database. From > memory... > > the database struct is > > struct dbstructType { > int ref; > char* text; /* This is a pointer. You can't store a pointer in a database, as the data it is pointing to is likely to have moved by the time you recall the database record. You need to store a Char ARRAY in the database. ie: Char text[32];, and StrCopy the data there.*/ > } *curRec; > > The input to add into the text is a text field: > > curRec->text=FldGetTextPtr(...); > > 1. is that the right way to code that? > 2. When I write: > > MemHandle hMem=DmNewRecord(gDBListBoxH,&position,sizeof(curRec)); /* If "curRec" is a pointer, sizeof(curRec) returns 4 */ > MemPtr p=MemHandleLock(hMem); > DmWrite(p,0,&curRec, sizeof(curRec)) /* "curRec" is a pointer. You are passing the address of (&) the pointer to this function.*/ > MemPtrUnlock(...) -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/ -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
