Database Search
If you can't find the information using the categories below, post a question over in our WinBatch Tech Support Forum.
TechHome
Registry
 |
- A definitve source of Registry info
- Accessing Alternate Registry View
- Additional Key Handles
- Backing up the Registry
- Basic Registry Info and Utilities
- Change Registry Permissions and Modify Read-Only Subkeys
- Changing Registry as Administrator in NT4
- Compare Registry - Before and After
- Connecting to a Registry on a Remote Computer
- Convert Qword
- Converting a Hex DWord Value into Four Octets
- DataItem or Subkey - Does Key Exist and RegQueryValue
- Determine All Extensions Associated with an Application
- Edit a REG File
- Error 5 Opening Registry Key
- Export Color Scheme from Registry
- How to Find a Particular Hive
- How to Make Registry Key Dump to a Text File
- How to Restore Registry in Win95
- How to Save Hive Files in Windows 95
- Importing 64 bit Registry Settings
- Modify Users Registry with Elevated Privileges
- PATH Information and RegApp
- Problem Closing RegConnect Connections Using WntCancelCon
- RegCreateKey Creating Key in Wrong Reg Hive
- RegDeleteKey failing from 64bit to 32-bit server
- RegEdit and Merging Databases
- RegEdit Command Line Options Syntax
- RegEdit Merge Into 64-bit Registry
- Registry Compare
- Registry Editing Permissions and Winbatch
- Registry Entry for WBTs
- Registry Keys additional for NT and 95
- Registry Run Keys - Run and Runonce
- RegLoadHive - RegUnloadHive - and Running REG Files
- RegOpenKeyEx Notes
- RegQueryEx for REG_EXPAND_SZ
- RegQueryKeys and Counting Subkeys
- RegQueryMulSz Problem
- RegSetBin and Hex7 Value
- RegSetDword and Hex
- RegSetDword and Setting Last Bit to 0
- Renaming Registry Keys
- Replace all Occurrences of a String
- Retain Percent Signs in SystemRoot
- Setting Binary Values Greater than 255 Chars
- Setting Unknown Registry Type
- SYSDIFF and other Registry Utilities
- Updating the Registry and Broadcast Message
- Utility to Monitor Registry
Can't find the information you are looking for here? Then leave a message over on our WinBatch Tech Support Forum.
Is it a Registry DataItem or Subkey?
Does Key Exist? Using RegQueryValue Function & ErrorMode(@off)
Keywords: regqueryvalue dataitem key subkey
Question:
I want a program to query the registry for a key, and if it finds the key it should just display the value in the message. If the key doesn't exist it should create a new one, add the value, then display that value.The function creates a new key and value OK if the key does not exist, however the RegQueryValue of rkey then returns an error. Why?
Answer:
There may be various things going on. Is what you want to query a key or a dataitem? If it is a key, it will be displayed in the LEFT panel in Regedit; if it is a dataitem, it will be displayed in the RIGHT panel in Regedit.Assuming "current_tag" is a key, here's how to use RegQueryValue:
ErrorMode(@off) ; See warnings
LastError()
ctag = RegQueryValue(@REGCURRENT, "software\peoplesoft\PSVerTag\CURRENT_TAG")
err=LastError()
ErrorMode(@cancel)
if err==0 ; it exists
Message("Current_tag default value is",ctag)
else
rkey = RegCreateKey(@REGCURRENT, "software\peoplesoft\PSVerTag\CURRENT_TAG")
RegSetValue(rkey, "","New User")
RegCloseKey(rkey)
MESSAGE("Current_tag","New User")
endif
Assuming "current_tag" is a dataitem, here's how to use RegQueryValue:
ErrorMode(@off) ; See warnings
LastError()
ctag = RegQueryValue(@REGCURRENT, "software\peoplesoft\PSVerTag[CURRENT_TAG]")
err=LastError()
ErrorMode(@cancel)
if err==0 ; it exists
Message("Current_tag default value is",ctag)
else
rkey = RegCreateKey(@REGCURRENT, "software\peoplesoft\PSVerTag")
RegSetValue(rkey, "[CURRENT_TAG]","New User")
RegCloseKey(rkey)
MESSAGE("Current_tag","New User")
endif
Article ID: W13716
Filename: DataItem or Subkey - Does Key Exist and RegQueryValue.txt
File Created: 1999:04:15:16:55:54
Last Updated: 1999:04:15:16:55:54