API data types

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<h2>Windows API Data types</h2>
<p>Windows API routines often require data types not used by VB. This is a text doc that explains the use of non-VB data types to help in converting C declarations to Visual Basic.</p>
<p>The procedures in DLLs are most commonly documented using C language syntax. To call these procedures from Visual Basic, you need to translate them into valid Declare statements and call them with the correct arguments.</p>
<p>As part of this translation, you must convert the C data types into Visual Basic data types and specify whether each argument should be called by value (ByVal) or implicitly, by reference (ByRef).</p>
<p>This text doc lists common C language data types and their Visual Basic equivalents for 32-bit versions of Windows, and includes some examples.</p>
<p>Also goes into some detail in explaining defined types such as LPDWORD, LPHWND, LPVOID and BSTR, and explains dealing with Strings and passing Null pointers.</p>
<p>Also covers the conversion of Large Integers to Currency. Windows and COM sometimes use 64-bit integers, and Visual Basic actually provides a 64-bit integer type - Currency.</p>
<p>Much of this information comes from Hard Core VB by Bruce McKinney, (else is part of the Win API documentation), from the MSDN Library.</p>
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