如何读取registrykey REG_DWORD值 [英] how to read the registrykey REG_DWORD value

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

返回值是

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

with

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

如果你读到这个： https://msdn.microsoft.com/en-us/library/windows/desktop/ms724911(v = vs.85）.aspx [ ^ ]



和这个：

https://social.msdn.microsoft.com/Forums/windowsdesktop/en-us/ 21c791ad-f1f3-4941-8ddc-8443447403c5 / how-to-use-regqueryvalueex-function-to-query-a-regdword-value-？forum = windowsgeneraldevelopmentissues [ ^ ]



你需要这样的东西（仅举例）

If you read this: https://msdn.microsoft.com/en-us/library/windows/desktop/ms724911(v=vs.85).aspx[^]

and this:
https://social.msdn.microsoft.com/Forums/windowsdesktop/en-us/21c791ad-f1f3-4941-8ddc-8443447403c5/how-to-use-regqueryvalueex-function-to-query-a-regdword-value-?forum=windowsgeneraldevelopmentissues[^]

You will need something like this (example only)

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

这篇关于如何读取registrykey REG_DWORD值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！