Programming Forums > Application Development > C++

Brent · May 29th, 2007, 5:33 PM

I was wondering if there is a WINAPI function that allows you to append text to text that is already in an EDIT box, or would I have to create my own function to do this? thanks for any help.

Im using Dev C++ on Win XP.

brent

The Dark · May 29th, 2007, 5:44 PM

You can use the EM_REPLACESEL message after setting the caret to the end of the edit control using EM_SETSEL (I think start of -1 and end of 0 does it, but I can't remember for sure).

Brent · May 31st, 2007, 8:50 PM

Alright, thanks i'll try that and see how it works out.

Brent · Jun 1st, 2007, 7:21 PM

The Dark, your idea worked great, but another problem popped up. Whenever I click the Edit box, the program exits. What could be causing this.

The Dark · Jun 1st, 2007, 7:31 PM

Without looking at your code, I have no idea, sorry.

Brent · Jun 1st, 2007, 9:12 PM

Yea, my bad, I dont have the code with me at the moment but I will post it.

Eoin · Jun 2nd, 2007, 5:55 AM

Completely random stab in the dark... Might you be missing a break statement such that the code which handles a left click runs on into a block for handling close messages or something similar?

Brent · Jun 2nd, 2007, 9:37 PM

Hmmm, thats interesting, i'll take a look at my code.

Brent · Jun 3rd, 2007, 11:46 AM

Ok, I have checked the code over and I didnt see any missing breaks, and I have attached the source for anyone who wants to take a look.

The Dark · Jun 3rd, 2007, 8:11 PM

I can't run through your code without the resource.h file (and the other resource files), but here are a few suspicious items:
1.

(Toggle Plain Text)

    SendDlgItemMessage(hwnd,IDC_ALL_MSG_BOX,EM_SETSEL,-1,(LPARAM)-1);

You are sending this dialog message in the "default" case when you receive a dialog message. Possibly this would end up causing an infinite recursion, as you might receive a dialog message in response to this dialog item message.

2.

(Toggle Plain Text)

          return NOT;

The documentation I read says either return TRUE or FALSE to a dialog message, I'm not sure why you are returning 2 (which would probably be the same as returning TRUE)

3.

(Toggle Plain Text)

          for(a=0;a<=sizeof(new_name);a++)

sizeof(new_name) returns exactly 4 in a 32 bit environment. You need to use strlen to find the length of a string.

Other than that, I can only suggest running the program through a debugger, setting a breakpoint on the EM_REPLACESEL lines and stepping through from there.

May 29th, 2007, 5:33 PM	#1
Brent Highly Adaptive Penguin Join Date: May 2005 Location: United States Posts: 251 Rep Power: 4	WIN32 API - Appending text in an EDIT box I was wondering if there is a WINAPI function that allows you to append text to text that is already in an EDIT box, or would I have to create my own function to do this? thanks for any help. Im using Dev C++ on Win XP. brent

Jun 2nd, 2007, 5:55 AM	#7
Eoin Hobbyist Programmer Join Date: Jun 2006 Location: Ireland Posts: 152 Rep Power: 3	Completely random stab in the dark... Might you be missing a break statement such that the code which handles a left click runs on into a block for handling close messages or something similar? __________________ Visit my website BinaryNotions.

Jun 3rd, 2007, 8:11 PM	#10
The Dark Expert Programmer Join Date: Jun 2005 Posts: 852 Rep Power: 4	I can't run through your code without the resource.h file (and the other resource files), but here are a few suspicious items: 1. (Toggle Plain Text) SendDlgItemMessage(hwnd,IDC_ALL_MSG_BOX,EM_SETSEL,-1,(LPARAM)-1); SendDlgItemMessage(hwnd,IDC_ALL_MSG_BOX,EM_SETSEL,-1,(LPARAM)-1); You are sending this dialog message in the "default" case when you receive a dialog message. Possibly this would end up causing an infinite recursion, as you might receive a dialog message in response to this dialog item message. 2. (Toggle Plain Text) return NOT; return NOT; The documentation I read says either return TRUE or FALSE to a dialog message, I'm not sure why you are returning 2 (which would probably be the same as returning TRUE) 3. (Toggle Plain Text) for(a=0;a<=sizeof(new_name);a++) for(a=0;a<=sizeof(new_name);a++) sizeof(new_name) returns exactly 4 in a 32 bit environment. You need to use strlen to find the length of a string. Other than that, I can only suggest running the program through a debugger, setting a breakpoint on the EM_REPLACESEL lines and stepping through from there.

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May 29th, 2007, 5:44 PM	#2
The Dark Expert Programmer Join Date: Jun 2005 Posts: 852 Rep Power: 4	You can use the EM_REPLACESEL message after setting the caret to the end of the edit control using EM_SETSEL (I think start of -1 and end of 0 does it, but I can't remember for sure).

May 31st, 2007, 8:50 PM	#3
Brent Highly Adaptive Penguin Join Date: May 2005 Location: United States Posts: 251 Rep Power: 4	Alright, thanks i'll try that and see how it works out.

Jun 1st, 2007, 7:21 PM	#4
Brent Highly Adaptive Penguin Join Date: May 2005 Location: United States Posts: 251 Rep Power: 4	The Dark, your idea worked great, but another problem popped up. Whenever I click the Edit box, the program exits. What could be causing this.

Jun 1st, 2007, 7:31 PM	#5
The Dark Expert Programmer Join Date: Jun 2005 Posts: 852 Rep Power: 4	Without looking at your code, I have no idea, sorry.

Jun 1st, 2007, 9:12 PM	#6
Brent Highly Adaptive Penguin Join Date: May 2005 Location: United States Posts: 251 Rep Power: 4	Yea, my bad, I dont have the code with me at the moment but I will post it.

Jun 2nd, 2007, 9:37 PM	#8
Brent Highly Adaptive Penguin Join Date: May 2005 Location: United States Posts: 251 Rep Power: 4	Hmmm, thats interesting, i'll take a look at my code.

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Programming Forums > Application Development > C++

WIN32 API - Appending text in an EDIT box