Use InnoSetup help
Code:
ValueType
The data type of the value. This must be one of the following:
none
string
expandsz
multisz
dword
qword
binary
If none (the default setting) is specified, Setup will create the key but not a value. In this case the ValueData parameter is ignored.
If string is specified, Setup will create a string (REG_SZ) value.
If expandsz is specified, Setup will create an expand-string (REG_EXPAND_SZ) value.
If multisz is specified, Setup will create an multi-string (REG_MULTI_SZ) value.
If dword is specified, Setup will create a 32-bit integer (REG_DWORD) value.
If qword is specified, Setup will create a 64-bit integer (REG_QWORD) value.
If binary is specified, Setup will create a binary (REG_BINARY) value.