Modify

New-Item -Path Registry::HKLM\Software\MyKey	Create registry key
reg add HKLM\Software\MyKey /v MyValue /t REG_SZ /d "Data"	Add registry key
Set-ItemProperty -Path Registry::HKLM\Software\MyKey -Name <Name> -Value "Data"	Set key value
Set-ItemProperty -Path dwm -PSProperty EnableAeroPeek -Value 0	Set EnableAeroPeek to 0
reg delete HKLM\Software\MyKey /v MyValue	Delete registry key or value
Remove-Item -Path Registry::HKLM\Software\MyKey	Delete registry key and its subkeys in PowerShell
Remove-ItemProperty -Path Registry::HKLM\Software\MyKey -Name MyValue	Delete registry value
reg copy HKLM\Software\MyKey HKLM\Software\NewKey	Copy registry key and its subkeys to a new location
reg import filename.reg	Imports registry settings
reg export HKLM\Software\MyKey filename.reg	Exports registry key and its subkeys
reg save HKLM\Software\MyKey filename.hiv	Saves a registry key and its subkeys in Hive (HIV) format
reg load HKLM\TempKey filename.hiv	Loads a Hive (HIV) file into the registry
reg unload HKLM\TempKey	Unloads a previously loaded Hive (HIV) file from the registry

Create the value Test in the RunOnce subkey of HKLM using the following command:

reg add hklm\software\microsoft\windows\currentversion\runonce /v Test /t REG_BINARY /d 1111

Modify the binary value of Test using the following command:

reg add hklm\software\microsoft\windows\currentversion\runonce /v Test /t REG_BINARY /d 1111

Delete the binary value for Test using the following command:

reg delete hklm\software\microsoft\windows\currentversion\runonce /v Test