Preventing Save Function Until Mandatory Fields Are Completed

Hi,

I'm trying to prevent a excel form being saved before certain cells are filled in. Need help in VBA query. Attaching my sample form.

Requirement 1 - If E1 is not NULL, then the user should enter the cell F1 compulsorily and sheet should return an error message as "Enter Work Status". Similarly for the entire column within the sheet and rest of the sheets in the workbook.

Requirement 2 - If F1 is "CLOSED", then the user should enter the cell G1 compulsorily and sheet should return an error message as "Enter End Status". Similarly for the entire column within the sheet and rest of the sheets in the workbook.

Is this possible? Any help would be greatly appreciated.

Important - The form is protected using "Protect Sheet" option.

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Narikisas,
The code is waitting for you
Just update the title as moderator is requesting it and send me a message
PCI

Here some code:
in a module put

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In ThisWorkbook put

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See attached
Now the sheet's name and the columns are parameters to informed when calling the function