IRegistryKey.ReadDouble

Syntax

ReadDouble(ValueName: String): Double;

Parameters

ValueName. Name of the parameter, which value must be obtained.

Description

The ReadDouble method reads real value from binary parameter in the registry without checking parameter availability.

Comments

If the parameter with the ValueName name does not exist, an exception is thrown.

Example

Executing the example requires that the registry subkey [HKEY_CURRENT_USER\Software\MyProject\Params] contains a binary parameter with the Param1 name with a real number stored in it.

Add a link to the Registry system assembly.

Sub UserProc;
Var
    RegKey, SubKey: IRegistryKey;
    d: Double;
Begin
    RegKey := RegistryClass.CurrentUser;
    SubKey := RegKey.OpenSubKey("Software\MyProject\Params", False);
    If SubKey.ValueExists("Param1") Then
        d := SubKey.ReadDouble("Param1");
    End If;
End Sub UserProc;

After executing the example the Param1 parameter is searched in the registry subkey [HKEY_CURRENT_USER\Software\MyProject\Params]. If the parameter exists, the real number that is contained in this parameter is read into the "b" variable.