Meaning of Reg key

the value HKLM\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER
\ADVANCED\FOLDER\SHOWALL\DEFAULTVALUE

IF THE VALUE IS “0x00000002”,what is the meaning of it???

HKLM\SOFTWARE\MICROSOFT\WINDOWS\CURRENTVERSION\EXPLORER
\ADVANCED\FOLDER\SHOWALL\CHECKEDVALUE

IF THE VALUE IS “0X00000002” WHAT IS THE MEANING OF THIS HEXADECIMAL VALUE.