String to MemHandle

Hi,

Sorry for being late but I thinkl I can Help

Your code I have modified

======================================
static void ActionLoadRecords (FormPtr frm)
{
     FieldPtr fld;
     MemHandle       h;
     Char*           buffer;
     Char           place[90];
     WChar           outChar;
     UInt16     index;
     UInt32     inOffset = 0;
     DmOpenRef       gDB = 0;
     UInt16     length;
     UInt16     b;
     
     index = 1;

     h = DmQueryRecord(gDB, index);
     buffer =  MemHandleLock(h);
     //MemHandleUnlock(h);
     
     length = StrLen(buffer);
     
     //place [length];
     
     b=0;
     
     while (inOffset<length)
     {
           inOffset += TxtGetNextChar(buffer, inOffset, &outChar);
        if (outChar == nullChr)
        {
              place[b]=outChar; //Modified b from b-1
        }
        b ++; //I addedd
     }
     
     //StrCopy(h, place); //this is the problem line
     StrCopy(buffer,place);
     
     fld = FrmGetObjectPtr (frm, FrmGetObjectIndex (frm, ActionPrevField));
     FldSetTextHandle (fld, h);
     FldReleaseFocus (fld);

     MemHandleUnlock(h); // Inserted here
}

======================================

I try to explain the Problem

MemHandle is a Void* data type.

I is used to allocate memory for Movable chuncks

Now DmQueryRecord returns such a unlocked handle whitch you store in some memhandle type variable

Palm OS can move this chunck for memory management So you have to lock this chunck for the time you require to process/access its data.

So MemHandleLock locks the check and return the ptr of type char*

You can perform operations on that pointer type such as Updations deletions
at the end when you unlock all the updations are retained in original handle

that handle can be assigned to a field
as FldSetTextHandle

Any query plz ask

Regards,