updating an edit control

Index > Windows > updating an edit control

Author

Thread

magicSqr

Joined: 27 Aug 2011
Posts: 105

magicSqr 27 Aug 2011, 09:35

Hi,

If I set the text in a multiline edit control with SetWindowText, it erases what is already in the control.

How do I append text to this control?

Do I have to save the contents to a buffer, append it to the buffer then use SetWindowText (which has the window constantly flashing because of the update) or is there another way?

Many thanks

magicSqr

27 Aug 2011, 09:35

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20405
Location: In your JS exploiting you and your system

revolution 27 Aug 2011, 12:11

magicSqr wrote:

How do I append text to this control?

Do I have to save the contents to a buffer, append it to the buffer then use SetWindowText (which has the window constantly flashing because of the update) ...

AFAIK, yes.

magicSqr wrote:

... or is there another way?

Perhaps manipulating the selection and using EM_REPLACESEL, but I doubt it would be easier or worth the extra effort.

27 Aug 2011, 12:11

magicSqr

Joined: 27 Aug 2011
Posts: 105

magicSqr 27 Aug 2011, 12:14

ok, thanks

27 Aug 2011, 12:14

AsmGuru62

Joined: 28 Jan 2004
Posts: 1657
Location: Toronto, Canada

AsmGuru62 27 Aug 2011, 13:53

If the multiline control is empty initially, then just use EM_REPLACESEL without manipulation a caret or selection (which is caret, basically). At the end of each line add CR/LF if ES_WANTRETURN flag was set when control is created.

27 Aug 2011, 13:53

magicSqr

Joined: 27 Aug 2011
Posts: 105

magicSqr 27 Aug 2011, 14:40

Sorry asmGuru, I didn't really understand

Quote:

then just use EM_REPLACESEL without manipulation a caret or selection (which is caret, basically).

Yes, the control is initially empty. I'm performing calculations and want to output relevant results to the control as they are found, keeping previous results still showing. basically

Code:

.loop:
    calculate until correct result
    update control
    jmp .loop

magicSqr

27 Aug 2011, 14:40

AsmGuru62

Joined: 28 Jan 2004
Posts: 1657
Location: Toronto, Canada

AsmGuru62 28 Aug 2011, 11:44

Here is the link to EM_REPLACESEL:
http://msdn.microsoft.com/en-us/library/bb761633(v=vs.85).aspx

Just pass parameters as it says there.

(Not all links are parsed properly by the forum. If I put the tags around it - the post is empty.)

28 Aug 2011, 11:44

magicSqr

Joined: 27 Aug 2011
Posts: 105

magicSqr 28 Aug 2011, 13:08

Brilliant

Many thanks for that AsmGuru

28 Aug 2011, 13:08

< Last Thread | Next Thread >

Forum Rules:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum