Hi,
I am new to palm programming.
I have created a form with a button. After clicking this button i am reading a
database and getting the first record from it.
I get this error--
Starter(1.0) called SysFatalAlert with the message "MemoryMgr.c,Line 4340, NULL handle"
code...
case frmViewCmdFirstButton:
memH = (MemHandle)DmQueryRecord(db,0);
recP = (DBRecordTypePtr)MemHandleLock(memH);
SetField(FrmViewForm,frmViewTxtNameField,recP->data);
MemHandleUnlock(memH);
MemHandleUnlock(h);
DmReleaseRecord(db,1,false);
break;
SetField ()---
static FieldPtr SetField(UInt16 formID, UInt16 fieldID,MemPtr str)
{
FormPtr frm;
FieldPtr fld;
UInt16 obj;
MemHandle h;
Char *p;
frm = FrmGetFormPtr(formID);
obj = FrmGetObjectIndex(frm,fieldID);
fld = (FieldPtr)FrmGetObjectPtr(frm,obj);
h = (MemHandle)FldGetTextHandle(fld);
p = (Char*)MemHandleLock(h);// this line gives the error
StrCopy(p, (Char*)str);
MemHandleUnlock(h);
FldSetTextHandle(fld,h);
}
Basically i want to retrieve records form a database and place them in the appropriate
text fields. How do i proceed.
Regards,
Salil.
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