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POAssembly Prototype instruction
 

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    <p>I am writing an assignment in MASM32 Assembly and I almost completed it but I have 2 questions I can't seem to answer. First, when I compile I get the message:</p> <blockquote> <p>INVOKE requires prototype for procedure</p> </blockquote> <p>&amp; </p> <blockquote> <p>invalid instruction operands</p> </blockquote> <p>the first is due to this piece of code:</p> <pre><code>.data? Freq DWORD ? Time1 DWORD ? Time2 DWORD ? .code start: invoke QueryPerformanceFrequency, addr Freq invoke QueryPerformanceCounter, addr Time1 </code></pre> <p>now, I know that </p> <blockquote> <p>The INVOKE directive must be preceded by a PROTO statement for the procedure being called.</p> </blockquote> <p>but even though I found out the syntax for the PROTO statement:</p> <pre><code>label PROTO [distance] [langtype] [,[parameter]:tag] </code></pre> <p>I don't understand exactly what I should write so as to make it work and I don't even know what is causing the second error or how to fix it...=/</p> <hr> <p><strong>Edit</strong></p> <p>I already have those libraries and these also:</p> <pre><code>.386 .model flat, stdcall option casemap :none include \masm32\include\windows.inc include \masm32\include\kernel32.inc include \masm32\include\masm32.inc includelib \masm32\lib\kernel32.lib includelib \masm32\lib\masm32.lib </code></pre> <p>I'm working under Windows Vista just in case that helps as well.</p> <hr> <p><strong>Edit 2</strong></p> <p>If I write the Freq :QWORD after the .data I get this error message:</p> <blockquote> <p>use of register assumed to ERROR</p> </blockquote> <p>and also where should I add the </p> <pre><code>QueryPerformanceCounter PROTO :DWORD </code></pre> <p>Which as far as I know didn't make an error but still I'm not sure changed anything (I placed it before .data and after the libraries).</p>
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    1. COIf you include kernel32.inc you don't need the prototype for the QueryPerformance* APIs. Try the last example i posted.
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