Set a button always disabled when App starting

[AndyPBC]

Hi,

i have PowerApps Form based on a sharepoint list and want that a button is always disabled when the app is started. Only when a user make changes in a date field, this button must be enabled (for a save (update) action)

I tried this on the OnStart function on the app:

onstart = button1.displaymode.disabled  ->> the app ignore this

also tried a varible for the displaymode button: onstart 0 Set(variablename;disabled)  -> not working

I only want that this button is not clickable when the app started. 

Really looking forward for help.

Thank you

[Drrickryp · Accepted solution]

@AndyPBC 

OnStart Set(varbutton,true)

Button Display mode: If(varbutton, Disabled, Edit)

To enable the button, Set(varbutton, false) somewhere else in the app and the button will stay enabled until the app is restarted. 

[AndyPBC]

That works excellent. Thank you so much.

Greetings

Andy