Thread: Help with setting text into LTEXT using Window Handle

Hi, need help again:

This is in the main function, the last statement being the message sending I want to send to my LTEXT.

Code:

case WM_INITDIALOG:{
           HWND handle;
           LRESULT l;

           handle = NULL;
           handle = GetDlgItem(hwnd2, ID_S_C);
           if (handle == NULL){
              MessageBox(hwnd2, "handle == NULL", "........", MB_OK);
           }
           l = SendMessage(handle, CB_ADDSTRING, (WPARAM) 0, (LPARAM) "Name"); /* LPARAM must be char[] string */
           l = SendMessage(handle, CB_SETCURSEL, (WPARAM) 0, (LPARAM) "Name");
           l = SendMessage(handle, CB_ADDSTRING, 0, (LPARAM) "Telephone");
           l = SendMessage(handle, CB_ADDSTRING, 0, (LPARAM) "Email");
           handle = NULL;
           handle = GetDlgItem(hwnd2, ID_GROUP);
           l = SendMessage(handle, CB_ADDSTRING, 0, (LPARAM) "All Contacts");
           l = SendMessage(handle, CB_SETCURSEL, 0, (LPARAM) "All Contacts");
           handle = GetDlgItem(hwnd2, ID_VIEW);
           l = SendMessage(handle, WM_SETTEXT, 0, (LPARAM) "abc");
        }

The construction of my dialog, the last and only LTEXT being the one I want to set text into.

Code:

IDD_FILE DIALOGEX DISCARDABLE  0, 17, 259, 300
STYLE DS_MODALFRAME | WS_POPUP | WS_CAPTION
FONT 8, "MS Sans Serif"
BEGIN
    PUSHBUTTON      "&Search", ID_SEARCH, 200, 20, 50, 14
    COMBOBOX        ID_S_C, 13, 20, 40, 100, CBS_DROPDOWNLIST | WS_VSCROLL | WS_TABSTOP
    EDITTEXT        ID_EDIT_FIELD, 60, 20, 133, 13
    PUSHBUTTON      "&Add", ID_ADD, 200, 65, 50, 14
    PUSHBUTTON      "&Edit", ID_EDIT, 200, 82, 50, 14
    PUSHBUTTON      "&Delete", ID_DELETE, 200, 99, 50, 14
    COMBOBOX        ID_GROUP, 13, 42, 60, 100, CBS_DROPDOWNLIST | WS_VSCROLL | WS_TABSTOP
    LISTBOX         ID_LIST, 13, 65, 120, 150, LBS_NOTIFY | WS_BORDER | WS_VSCROLL
    LTEXT           ID_VIEW, 13, 220, 230, 70, SS_WHITERECT | WS_BORDER | SS_LEFT
END

Thanks in advance.

The LTEXT control is normally used to display static text. For example, an edit control used to input a last name would have a LTEXT control to the left of it to display "Last Name" static text. It normally would be assigned IDC_STATIC control id. In this example, the LTEXT in your resource file should look like the following:

Code:

 LTEXT         "abc",  IDC_STATIC, 13, 220, 230, 70, SS_WHITERECT | WS_BORDER | SS_LEFT

Use the following if you wish to change the text in LTEXT control:

Code:

 handle = GetDlgItem(hwnd2, ID_VIEW);
 SetWindowText(handle, "abc");

Again, to repeat myself, LTEXT is normally used to display static text. That is, text that is not changed by the program.

Originally Posted by jasperleeabc

Then which resource should I use for text boxes that can only be changed by the program but not the user?

Many thanks.

And the code provided somehow doesn't work also... I guess I need to know the proper way to do it.

SS_WHITERECT will cause the static to show as a white colored bar without text. Remove the SS_WHITERECT and this should resolve your problem.

Then is it possible to set the background color of that LTEXT to be white?

Originally Posted by jasperleeabc

Then is it possible to set the background color of that LTEXT to be white?

Here's a simple example of one way to set the background color to any color of your choice. This example sets the background color to green.

Code:

//{{NO_DEPENDENCIES}}
// Microsoft Developer Studio generated include file.

#define IDC_EXIT                        1001
#define IDD_EXAMPLE                     1002
#define IDC_STATIC_TEXT                 1003
#define IDC_EDIT1                       1004
#define IDC_CHANGE                      1005

// Next default values for new objects
// 
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE        101
#define _APS_NEXT_COMMAND_VALUE         40001
#define _APS_NEXT_CONTROL_VALUE         1003
#define _APS_NEXT_SYMED_VALUE           101
#endif
#endif

Code:

//Microsoft Developer Studio generated resource script.
//
#include "resource.h"

#define APSTUDIO_READONLY_SYMBOLS
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 2 resource.
//
#define APSTUDIO_HIDDEN_SYMBOLS
#include "windows.h"
#undef APSTUDIO_HIDDEN_SYMBOLS

/////////////////////////////////////////////////////////////////////////////
#undef APSTUDIO_READONLY_SYMBOLS

/////////////////////////////////////////////////////////////////////////////
// English (U.S.) resources

#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
#ifdef _WIN32
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
#pragma code_page(1252)
#endif //_WIN32

/////////////////////////////////////////////////////////////////////////////
//
// Dialog
//

IDD_EXAMPLE DIALOG DISCARDABLE  0, 0, 122, 59
STYLE DS_MODALFRAME | DS_3DLOOK | DS_CENTER | WS_POPUP
FONT 16, "Comic Sans MS"
BEGIN
    DEFPUSHBUTTON   "Exit",IDC_EXIT,64,34,50,14
//   LTEXT           "Last Name:",IDC_STATIC_TEXT,11,12,35,8
//SS_WHITERECT will result the static to show as a white colored bar without text
//CONTROL       "Last Name:",IDC_STATIC_TEXT, "static",WS_BORDER | SS_LEFT,11,12,35,8, 
LTEXT           "Last Name:",IDC_STATIC_TEXT,11,12,35,8, WS_BORDER | SS_LEFT

    EDITTEXT        IDC_EDIT1,48,11,67,12,ES_AUTOHSCROLL
    DEFPUSHBUTTON   "Change Text",IDC_CHANGE,6,34,50,14
END


#ifdef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// TEXTINCLUDE
//

1 TEXTINCLUDE DISCARDABLE 
BEGIN
    "resource.h\0"
END

2 TEXTINCLUDE DISCARDABLE 
BEGIN
    "#define APSTUDIO_HIDDEN_SYMBOLS\r\n"
    "#include ""windows.h""\r\n"
    "#undef APSTUDIO_HIDDEN_SYMBOLS\r\n"
    "#include ""labels.h""\r\n"
    "\0"
END

3 TEXTINCLUDE DISCARDABLE 
BEGIN
    "\r\n"
    "\0"
END

#endif    // APSTUDIO_INVOKED


/////////////////////////////////////////////////////////////////////////////
//
// DESIGNINFO
//

#ifdef APSTUDIO_INVOKED
GUIDELINES DESIGNINFO DISCARDABLE 
BEGIN
    IDD_EXAMPLE, DIALOG
    BEGIN
        RIGHTMARGIN, 121
        BOTTOMMARGIN, 57
    END
END
#endif    // APSTUDIO_INVOKED

#endif    // English (U.S.) resources
/////////////////////////////////////////////////////////////////////////////



#ifndef APSTUDIO_INVOKED
/////////////////////////////////////////////////////////////////////////////
//
// Generated from the TEXTINCLUDE 3 resource.
//


/////////////////////////////////////////////////////////////////////////////
#endif    // not APSTUDIO_INVOKED

Code:

#pragma comment(lib, "user32.lib")
#pragma comment(lib, "gdi32.lib")
#include <windows.h>
#include "resource.h"

BOOL CALLBACK MyExample(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	static BOOL bSwap = TRUE;
	HWND handle;
	switch (message) {
		case WM_INITDIALOG:
			SetBkColor((HDC) wParam, RGB(0,255,0) );
			return (int)CreateSolidBrush(RGB(0,255,0));
		case WM_CTLCOLORSTATIC:
			{
				if(GetDlgItem(hDlg, IDC_STATIC_TEXT) == (HWND)lParam)
				{
					SetBkColor((HDC) wParam, RGB(0,255,0) );
					return (int)CreateSolidBrush(RGB(0,255,0));
				}
				return 0;
			}
		case WM_COMMAND:
			switch(LOWORD(wParam))
			{
				case IDC_EXIT:
					EndDialog(hDlg, TRUE);
					break;
				case IDC_CHANGE:
					handle = GetDlgItem(hDlg, IDC_STATIC_TEXT);
					if(bSwap)
						SetWindowText(handle , "abc");
					else
						SetWindowText(handle , "Last Name:");   
					bSwap = !bSwap;
					break;
			}
			break;
	}
	return FALSE;
}

int WINAPI WinMain(HINSTANCE hInstance,
	   HINSTANCE hPrevInstance,
	   LPSTR lpszArgs,
	   int nWinMode)
{
	DialogBox(hInstance ,MAKEINTRESOURCE(IDD_EXAMPLE) , 0, MyExample);
	return 0;
}

Many thanks!!!