Setting focus on DialogBox in DialogBox while both creating

1st sorry for my english. 2nd - I have a big problem, which I cannot solve. I have this simple
code:

Code:

#include <windows.h>#include <windowsx.h>
#include <commctrl.h>
#include "main.h"


BOOL CALLBACK DlgProc( HWND, UINT, WPARAM, LPARAM);
HINSTANCE hInst;


int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd ) {


    hInst = hInstance;


    INITCOMMONCONTROLSEX icc;
    icc.dwICC = ICC_WIN95_CLASSES;
    icc.dwSize = sizeof( icc );
    InitCommonControlsEx( &icc );


    WNDCLASSEX wcx;
    wcx.cbSize = sizeof( wcx );


    if ( !GetClassInfoEx(NULL, MAKEINTRESOURCE(32770), &wcx) ) {
        MessageBox( NULL, "Error creating class.", "Error", MB_OK | MB_ICONERROR );
        return 0;
    }


    wcx.hInstance = hInstance;
    wcx.hIcon = LoadIcon( hInstance, IDI_APPLICATION );
    wcx.lpszClassName = "VantSnake";


    if ( !RegisterClassEx(&wcx) ) {
        MessageBox( NULL, "Error creating application.", "Error", MB_OK | MB_ICONERROR );
        return 0;
    }


    return DialogBox( hInstance, MAKEINTRESOURCE(VNTH_MAIN), NULL, (DLGPROC) DlgProc );


}


BOOL CALLBACK DlgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ) {


    switch ( msg ) {
        case WM_COMMAND:
            switch ( GET_WM_COMMAND_ID(wParam, lParam) ) {
                case IDOK:
                    EndDialog( hWnd, 0 );
                    break;
            }
            break;
        case WM_CLOSE:
            EndDialog( hWnd, 0 );
            break;
        case WM_INITDIALOG:
            if ( !FindWindow(NULL, "Intro") ) {


                // creates Intro dialog box
                CreateDialog( GetModuleHandle(NULL), MAKEINTRESOURCE(VNTH_START), hWnd, (DLGPROC) DlgProc );
            } else {


                // here i'm trying to set focus on it, but it doesnt't works
                SetForegroundWindow( hWnd );
                SendMessage( hWnd, WM_NEXTDLGCTL, (WPARAM) GetDlgItem(hWnd, VNTH_START), TRUE );


            }
            return 1;
    }


    return 0;


}

I create one DialogBox as main application window and second (Intro), which appears at the start as well in WM_INITDIALOG case. The problem is, that the main window, although it's under the Intro window - is focused. I was trying to set focus into Intro window, as I found in other thread (by SetForeground and SendMessage) but it's still not working. I
m little bit frustrating, because I'm trying to solve it for hours with no effect. Please, if anyone has solution for that, help. The link for Pelles C project: http://www.filolozka.pl/C/VantSnake.zip
Of course VNTH_MAIN and VNTH_START are resource linkages to Main and Intro windows.

From MSDN on WM_INITDIALOG

The dialog box procedure should return TRUE to direct the system to set the keyboard focus to the control specified by wParam. Otherwise, it should return FALSE to prevent the system from setting the default keyboard focus.

So you may set the focus to the Intro dialog but then you return true and set the focus to the main dialog.

Also...

Code:

SendMessage( hWnd, WM_NEXTDLGCTL, (WPARAM) GetDlgItem(hWnd, VNTH_START), TRUE );

I do not think this will work, as VNTH_START is a dialog, not a control on the main dialog.

Code:

CreateDialog( GetModuleHandle(NULL), MAKEINTRESOURCE(VNTH_START), hWnd, (DLGPROC) DlgProc );

Create a WNDPROC / callback for each dialog. ie create a new callback for the intro dialog (ie IntroDlgProc).

Re-using the same callback is a very bad idea.

Code:

CASE WM_INITDIALOG:
	HWND hIntroWnd = FindWindow(NULL, "Intro");
	//did we find the window?
	if(hIntroWnd == NULL)
	{
		//into window not found so create it
		CreateDialog( GetModuleHandle(NULL), MAKEINTRESOURCE(VNTH_START), hWnd, (DLGPROC) IntroDlgProc ); 
	}

	//now set focus on into window
	SetForegroundWindow( hIntroWnd ); //make sure we use the Intro Windows HWND
	//do not set the focus
	return FALSE;
break;

Ok, I did everything according to your suggestions, the code of splited Callback functions (WinMain with no changes):

Code:

BOOL CALLBACK DlgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ) {


    switch ( msg ) {
        case WM_COMMAND:
            break;
        case WM_CLOSE:
            EndDialog( hWnd, 0 );
            break;
        case WM_INITDIALOG:;
            HWND hwnd = FindWindow( NULL, "Intro" );
            if ( hwnd == NULL ) {
                CreateDialog( GetModuleHandle(NULL), MAKEINTRESOURCE(VNTH_START), hWnd, (DLGPROC) DlgIntroProc );
            }
            SetForegroundWindow( hwnd );
    }


    return FALSE;


}


BOOL CALLBACK DlgIntroProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ) {


    switch ( msg ) {
        case WM_COMMAND:
            switch ( GET_WM_COMMAND_ID(wParam, lParam) ) {
                case IDOK:
                    EndDialog( hWnd, 0 );
                    break;
            }
            break;
        case WM_CLOSE:
            EndDialog( hWnd, 0 );
            break;
        case WM_INITDIALOG:
            //HWND hwnd = FindWindow( NULL, "Intro" );
            //SetForegroundWindow( hwnd );
            SetForegroundWindow( hWnd );
    }


    return FALSE;


}

But it's still not working. The main window, which is disabled is still on focus, not the Intro window, which is over it. The interesting thing is, that I must use ";" after CASE : statement, otherwise it throws error (invalid use of type name HWND). When I call any function first, I don't have to do that. Nevermind, it's still not working and Intro window isn't focused, unfortunately any other idea?

Try something like;

Code:

BOOL CALLBACK DlgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam ) {

//snip
            if ( hwnd == NULL ) {
                hwnd = CreateDialog( GetModuleHandle(NULL), MAKEINTRESOURCE(VNTH_START), hWnd, (DLGPROC) DlgIntroProc );//make sure hwnd has a non null value
            }
            SetForegroundWindow( hwnd );
            return false;//return false to stop focus change
            break;//not required (if you have a specific return) but included for readablity

BOOL CALLBACK DlgIntroProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
 {    
       //snip
       case WM_INITDIALOG:             
            return true; 
       break;
}

If the intro dlg is a splash screen then try using a modal dialog, which will disable the main dlg until it closes. ie use DialogBox() instead of CreateDialog()