Downloading in Win32

This is a discussion on Downloading in Win32 within the C++ Programming forums, part of the General Programming Boards category; Hi everyone, I have the following code in my Win32 program which is supposed to download an image from the ...

  1. #1
    Registered User
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    Feb 2010
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    Downloading in Win32

    Hi everyone,

    I have the following code in my Win32 program which is supposed to download an image from the specified URL when I press the 'download' button, and then open it:

    Code:
    			
    case IDC_DOWNLOAD:
    HRESULT hr = URLDownloadToFile( NULL, L"http://www.url.com/image.jpg", L"image.bmp", 0, NULL );
    system("image.bmp");
    break;
    However, when I compile, I get this:

    Code:
    error C2664: 'URLDownloadToFileA' : cannot convert parameter 2 from 'const wchar_t [69]' to 'LPCSTR'
    I'm guessing that this is something to do with the fact that the URLDownloadToFile operation is only supposed to be used in console programs? How do I adapt it to work in Win32?

    Thanks.

  2. #2
    Registered User
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    If you want to use unicode string, then you need to use the correct unicode functions:
    Code:
    HRESULT hr = URLDownloadToFileW( NULL, L"http://www.url.com/image.jpg", L"image.bmp", 0, NULL );
    bit∙hub [bit-huhb] n. A source and destination for information.

  3. #3
    a_capitalist_story
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    Go to Project Properties - General - Project Defaults - Character Set and change it to the Unicode character set.

  4. #4
    Programming Wraith GReaper's Avatar
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    OMG!...

    This one tells pretty much everything.
    error C2664: 'URLDownloadToFileA' : cannot convert parameter 2 from 'const wchar_t [69]' to 'LPCSTR'
    Remove the "L" before your strings!

    EDIT: Three people posted at exactly the same time! What are the odds for that?
    Devoted my life to programming...

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