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primarykey
Id
8025539
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0
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CreationDate
2011-11-06T06:12:59.180
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2011-11-06T06:22:48.923
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2011-11-06T06:22:48.923
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129032
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129032
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8025519
PostTypeId
2
Score
3
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text
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The <code>#import</code> directive is used with type libraries, often COM or .Net, not C++ source files. For complete details, see <a href="http://msdn.microsoft.com/en-us/library/8etzzkb6%28v=VS.100%29.aspx" rel="nofollow">the MSDN page</a>. In order to include C++ functions from another file, you typically want to use the <code>#include</code> directive (<a href="http://msdn.microsoft.com/en-us/library/36k2cdd4.aspx" rel="nofollow">details</a>). This includes the code from the given file during compilation. Most often, you should include a header containing the function prototypes; it is possible to include code files, but not commonly needed or always safe. To do this, you should provide two files, a header and a source file, for your functions. The header will read something like: <pre><code>#pragma once void Function(int arg); </code></pre> and the source: <pre><code>#include "functions.hpp" void Function(int arg) { ++arg; } </code></pre> To use this in another file, you do: <pre><code>#include "functions.hpp" void OtherFunction() { Function(2); } </code></pre> You should also note that a header should typically be included only once. The MSVC-standard method of guaranteeing this is to add <code>#pragma once</code> to the beginning. Edit: and to address the specific error you've posted, which applies to both <code>#import</code> and <code>#include</code>, the file you're attempting to include must be somewhere within the compiler's search path. In Visual Studio, you should add the necessary path to the project includes (this varies by version, but is typically under project properties -> compiler).
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