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POno suitable conversion function from "std::string" to "PVOID" exists
 

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  1. POno suitable conversion function from "std::string" to "PVOID" exists
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    <p>I am trying to use the SetParametersInfo function to change wallpapers.I would like to pass the filepath for the wallpaper as a variable, but whenever I try to do this, I get the error</p> <pre><code>Error: no suitable conversion function from "std::string" to "PVOID" exists </code></pre> <p>Here is the code I have thus far </p> <pre><code>#include &lt;windows.h&gt; #include &lt;stdio.h&gt; #include &lt;iostream&gt; #include &lt;string&gt; #pragma comment(lib, "user32.lib") using namespace std; #define _TEXT(x) L##x void main(){ string input =""; cout &lt;&lt; "Enter the filepath\n"; getline(cin, input); BOOL success = SystemParametersInfo( SPI_SETDESKWALLPAPER, //iuAction 0, //uiParam input, //pvParam SPIF_UPDATEINIFILE //fWinIni ); if (success){ printf("Success!\n"); }else printf("Failure =(\n"); } </code></pre> <p>Do you guys have any suggestions for what I can do? I have looked all over to find a solution and haven't been able to find one. Perhaps I am not searching for the right terms.</p> <p>Extra info: I am running Windows 7 and using Visual Studio 2010 Ultimate. </p> <p><strong>Edit:</strong> I finally got it to work. I had to change the "Character Set" setting to "Not Set" then it worked fine. Here is the updated code:</p> <pre><code>#include &lt;windows.h&gt; #include &lt;stdio.h&gt; #include &lt;iostream&gt; #include &lt;string&gt; #pragma comment(lib, "user32.lib") using namespace std; void main(){ string input =""; cout &lt;&lt; "Enter the filepath\n"; getline(cin, input); BOOL success = SystemParametersInfo( SPI_SETDESKWALLPAPER, //iuAction 0, //uiParam (PVOID) input.c_str(), //pvParam SPIF_UPDATEINIFILE //fWinIni ); if (success){ printf("Success!\n"); }else{ printf("Failure =(\n "); cout &lt;&lt; input &lt;&lt; "\n"; cout &lt;&lt; (PVOID) input.c_str()&lt;&lt; "\n"; } } </code></pre>
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    1. USChris Dibble
    1. USChris Dibble
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    1. COSame problem you got last time, the pvParam argument is of type void*. This time there is no standard conversion from std::string to void*. And using string::c_str() gets you the same problem back again, it isn't a Unicode string like std::wstring.
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      1. POno suitable conversion function from "std::string" to "PVOID" exists
      1. USHans Passant
    2. COI see what you are trying to say I think, but before I was able to add the L to the beginning of the string literal (ie, L"C:/test.jpg"). I don't know how to do this when I am dealing with a variable instead of a literal.
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      1. USChris Dibble
 

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