Edit control help

**terracota** · 12-01-2004

hi im trying to append text to and edit box that already have some text, i use EM_SETSEL but the new text allways replace the old one i created a edit box like:

Code:

EditB = CreateWindowEx(NULL,"EDIT","",
			WS_CHILD | WS_VISIBLE | WS_HSCROLL | WS_VSCROLL |
            ES_LEFT | ES_MULTILINE | ES_NOHIDESEL 
			| ES_AUTOHSCROLL | ES_AUTOVSCROLL,0,0,528,482,
				hwnd,(HMENU)ID_EDIT,GetModuleHandle(NULL),NULL);

and the:

Code:

int tamanio = 0;
//...a loop starts here
...new string linea here(reading from file)
SetDlgItemText(hwnd,ID_EDIT,linea);
tamanio=GetWindowTextLength(EditB)
SendMessage(EditB,EM_SETSEL,tamanio,tamanio);
//...here a loop returns

i think the SetDlgItemText function is the problem, is there another way to append text to an editbox, or what im doing wrong?

thanks for any help

**paul_uk** · 12-01-2004

Why dont you store the old text and use strcat to append your text, then send the new text to the control

**terracota** · 12-01-2004

Originally Posted by paul_uk

Why dont you store the old text and use strcat to append your text, then send the new text to the control

ok good idea, but what im trying to do is to load a text file into the edit box, and what happens if the text file is too big? will this be efficient? i mean the "string" will too big.

thanks for reply

**bithub** · 12-01-2004

Make the edit box multi-lined, and give it a vertical scroll bar. Then the string can never be too big.

**terracota** · 12-01-2004

good thanks for help,
but:
if im reading from a file what could be best, read char by char or read a whole line? why i ask this?
because if im trying to read a text file that haves only 1 line of text but that line of text haves 1000 chars? and i declared my string to hold that text with ie. [80]?

and am i using the wrigth function to append text to an editbox? SetDlgItemText()

**anonytmouse** · 12-02-2004

SetDlgItemText will set the text for a control. To replace the selection only use EM_REPLACESEL.

Append edit text

**terracota** · 12-02-2004

thanks for help

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