subject_35780.htm

一些关于vc的问答

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序号：35780 发表者：xuchun 发表日期：2003-04-09 13:39:03
<br>主题：如何使用RegSetValueEx
<br>内容：我想改动注册表中的一个变量的值，如何用这个函数呢？<BR><BR><BR>LONG RegSetValueEx(<BR>&nbsp;&nbsp;HKEY hKey,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // handle to key<BR>&nbsp;&nbsp;LPCTSTR lpValueName, // value name放变量名吗？<BR>&nbsp;&nbsp;DWORD Reserved,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// reserved<BR>&nbsp;&nbsp;DWORD dwType,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// value type<BR>&nbsp;&nbsp;CONST BYTE *lpData,&nbsp;&nbsp;// value data这个参数如何使用。<BR>&nbsp;&nbsp;DWORD cbData&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // size of value data<BR>);<BR>lpData <BR>[in] Pointer to a buffer containing the data to be stored with the specified value name. For string-based data types, such as REG_SZ, the string must be NULL-terminated. With the REG_MULTI_SZ data type, the string must be double-NULL terminated
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<font color=red>答案被接受</font><br>回复者：(zl剑客) 回复日期：2003-04-09 14:46:16
<br>内容：LONG RegSetValueEx(<BR>&nbsp;&nbsp;HKEY hKey,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // handle to key<BR>&nbsp;&nbsp;LPCTSTR lpValueName, // value name放变量名吗？<BR>&nbsp;&nbsp;DWORD Reserved,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// reserved<BR>&nbsp;&nbsp;DWORD dwType,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;// value type<BR>&nbsp;&nbsp;CONST BYTE *lpData,&nbsp;&nbsp;// value data这个参数如何使用。<BR>&nbsp;&nbsp;DWORD cbData&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // size of value data<BR>);<BR><BR>lpValueName 指你要修改的值对应的名字<BR>lpData 指需的值的地址<BR>按如下：<BR>DWORD value = 100 ;<BR><BR>RegSetValueEx(<BR>&nbsp;&nbsp;hKey,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <BR>&nbsp;&nbsp;"ValueName", <BR>&nbsp;&nbsp;0,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;REG_DWORD,&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<BR>&nbsp;&nbsp;(LPBYTE)&amp;value,&nbsp;&nbsp;<BR>&nbsp;&nbsp;sizeof(DWORD)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <BR>);<BR>
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回复者：沈落 回复日期：2003-04-09 20:07:48
<br>内容：搞明白了，但发现LPBYTE是对应二进制的值。<BR>而我恰恰改的是一个双字节的值。<BR>于是，注册表里面的值，虽然改了，却不起作用。<BR>再次，请教，如何改动双字节值呢？
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回复者：沈落 回复日期：2003-04-10 18:54:15
<br>内容：那位能帮我一把。
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