How to create a destname which includes date and time at installation in Inno Set-up

I want to use the [Files] section to create a new file which has the format:

Program Name plus date plus time .fmpur

I'd be grateful for any ideas.

How do I create a custom page in Inno?

Text := 'TMemo'; Memo. Parent := Page. Surface; Lbl := TLabel. Create(Page); Lbl.

How do you write an Inno Script?

The Inno Setup Example Scripts are located in a separate folder. Please click the "Inno Setup Example Scripts" shortcut created in the Start Menu when you installed Inno Setup, or open the "Examples" folder in your Inno Setup directory.

For instance the following way. How to modify a date time pattern, see the GetDateTimeString page:

[Setup]
AppName=My Program
AppVersion=1.5
DefaultDirName={pf}\My Program

#define FileNamePattern SetupSetting("AppName") + " " + GetDateTimeString('dd-mm-yyyy hh-nn-ss', '-', ':') + ".fmpur";

[Files]
Source: "MyProg.exe"; DestDir: "{app}"; DestName: "{#FileNamePattern}"