Dialog box halting program

Hi everyone,

I have some code which downloads an image from the internet when a button IDC_DOWNLOAD is pressed in a Win32 program:

Code:

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case IDC_DOWNLOAD:
        DialogBox(GetModuleHandle(NULL), MAKEINTRESOURCE(IDD_LOADING), hwnd, ToolDlgProc);
        URLDownloadToFile( NULL, "http://website.com/image.jpg", "image.bmp", 0, NULL );
        ShellExecute(NULL, "open", "image.bmp", NULL, NULL, SW_SHOWNORMAL);                                       
break;

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It works fine and downloads and displays the image when I get rid of the DialogBox line, but for some reason when I put the DialogBox part in, it just opens the dialog box and doesn't download the image. Is there a way to load a dialog box and also continue to download and display the image?

Thanks.

From MSDN:

Quote:

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DialogBox does not return control until the specified callback function terminates the modal dialog box by calling the EndDialog function.

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If that's not what you want, then don't use DialogBox.

Thanks - what are the alternatives?

Opening up any other type of window? (e.g. with CreateWindow)

Quote:

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Originally Posted by george7378

Thanks - what are the alternatives?

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Look up CreateDialog() ...

Thanks for the tips. I had a look at CreateDialog(), and I put it into the code. It compiles OK, but when I press the button, the dialog box doesn't appear (the image downloads and opens OK, but the box doesn't work). Is there anything else I need to add in apart from changing 'DialogBox' for 'CreateDialog'?

Thanks.

Not having looked at MSDN, perhaps ShowWindow?

Quote:

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Originally Posted by Elysia

Not having looked at MSDN, perhaps ShowWindow?

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Yep, that sorted it. Thanks for all your help guys!

Quote:

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Originally Posted by george7378

Thanks for the tips. I had a look at CreateDialog(), and I put it into the code. It compiles OK, but when I press the button, the dialog box doesn't appear (the image downloads and opens OK, but the box doesn't work). Is there anything else I need to add in apart from changing 'DialogBox' for 'CreateDialog'?

Thanks.

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Sigh... read the requirements... CreateDialog Function (Windows)

See the lpTemplate parameter in there... That is for a dialog box template stored in your program's resources.

Read this... theForger's Win32 API Tutorial for a tutorial on the proper construction of Windows GUI mode programs.

You might want to use a GUI library for your GUI programming. Which ones exist depend on which language you're using.