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    <p>Ok I started this with a comment, but its getting out of control.</p> <p><strong>For Writing</strong></p> <p>This:</p> <pre><code>WCHAR *lpszText = new WCHAR[dwTextSize]; </code></pre> <p>should be:</p> <pre><code>WCHAR *lpszText = new WCHAR[dwTextSize+1]; </code></pre> <p>This:</p> <pre><code>DeleteObject(hTextFile); </code></pre> <p>should not be there <strong>at all.</strong>. Get rid of it.</p> <p>I'm assuming you <code>delete [] lpszText;</code> somewhere when you're done with it. if not, do so.</p> <hr> <p><strong>For Reading</strong></p> <p>The second parameter to <code>GetFileSize()</code> should not be the same variable as your return value. It is the HIGH 32bit of a 64-bit value for large file sizes. If you know you're file size is smaller than 4gB, you can leave it NULL, so change this:</p> <pre><code>DWORD dwFileSize = GetFileSize(hTextFile, &amp;dwFileSize); </code></pre> <p>to this:</p> <pre><code>DWORD dwFileSize = GetFileSize(hTextFile, NULL); </code></pre> <p>You must account for the null terminator of your file buffer, so this:</p> <pre><code>WCHAR *lpszText = new WCHAR[dwFileSize / 2]; </code></pre> <p>should be changed to this:</p> <pre><code>WCHAR *lpszText = new WCHAR[dwFileSize / 2 + 1]; lpszText[dwFileSize / 2] = 0; </code></pre> <p>and the rest should work as you're hoping it would. No error checking, which is not good, but I've seen worse. And as before, I'm assuming you <code>delete [] lpszText;</code> somewhere when you're done with it. if not, do so.</p>
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    1. POIn Win32, how can a text file be successfully read into memory?
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    1. USWhozCraig
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    1. POIn Win32, how can a text file be successfully read into memory?
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    1. COExcellent post. It's amazing how 8 lines of code had so many mistakes/issues... I don't know that I would use `lpszText[dwFileSize/2] = 0` personally; I much prefer to `memset` the buffer to all zeroes directly, but that's a style thing.
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      1. USNik Bougalis
    2. CO@NikBougalis most of it is common for people new to both Windows and C/C++. The only one that made me go "wtf???" was the `DeleteObject()`. Lord knows where *that* came from. And regarding `memset`, its a performance thing. No need to fill memory with a bunch of zeros only to have all-but-one of them overwritten immediately after. Comes from platforms where doing that can get expensive. But whatever works and lets you sleep at night =P
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    3. COYeah, the DeleteObject was peculiar. As for `memset`, I get where you're coming from - I'm a big performance-squeezing geek too, alas it's a requirement we have at my workplace...
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