如何读取registrykey REG_DWORD值

本文介绍了如何读取registrykey REG_DWORD值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

DWORD dwType = REG_DWORD;
size1=1024;	
			
if((RegQueryValueEx(keyHandle,"Value",NULL,&dwType,(LPBYTE)rgValue1,&size1))
SetDlgItemText(IDC_EDIT, rgValue1);

我想读取一个DWORD类型的registrykey（值）并希望在编辑框中显示它，但RegQueryValueEx函数返回空值。请帮助我

I want to read a registrykey(value) which is of DWORD type and want to display it in the editbox but RegQueryValueEx function returns empty value.please help me

推荐答案

ERROR_SUCCESS 0 (0x0)

如果没有发生错误！

您需要更改

if no errors occurs!

You need to change

if((RegQueryValueEx(keyHandle,"Value",NULL,&dwType,(LPBYTE)rgValue1,&size1))

with

if(RegQueryValueEx(keyHandle,"Value",NULL,&dwType,(LPBYTE)rgValue1,&size1 == ERROR_SUCCESS)

    DWORD dwData;
DWORD cbData = sizeof(DWORD);
DWORD dwRet;
   dwRet = RegQueryValueEx( HKEY_PERFORMANCE_DATA,
                     TEXT("Global"),
                     NULL,
                     NULL,
                     (LPBYTE)&dwData,
          &cbData );

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