Re-write dynamic textbox after button is pressed

I've created a code in VBA to collect data using a multi-page control. In each page, I've added checkboxes dynamically based on rows from the worksheet in Excel and, for each checkbox, there's a textbox and 2 command buttons, just like the image below:

The code to automatically add controls is:

Private Sub UserForm_Initialize()
fmat_disp.Value = 0
fmat_set.Value = 0


'---------------------------------------------------------------------------------------------
'Inspeção de Mecânica
Sheets("Mecânica").Activate
n_anom = Application.WorksheetFunction.CountA(Range("1:1")) - 1
AreasInspecao.mecanica.ScrollHeight = 10 + 18 * (n_anom)
For i = 1 To n_anom
'Selecionar anomalia
Set SelAnom = AreasInspecao.mecanica.Controls.Add("Forms.CheckBox.1", "sel_anom_" & i)
SelAnom.Caption = Worksheets("Mecânica").Cells(1, i + 1)
SelAnom.AutoSize = True
SelAnom.Height = 18
SelAnom.Left = 5
SelAnom.Top = 5 + (SelAnom.Height) * (i - 1)
SelAnom.Tag = i

Same goes to the textbox and plus/minus buttons, only changing the captions.

What I want is: 1) when CHECKBOX is CHECKED, respective TEXTBOX must show 1 2) when MINUS sign is PRESSED, respective TEXTBOX must decrement 3) when PLUS sign is PRESSED, respective TEXTBOX must increment 4) when "Finalizar Inspeção" is PRESSED, all data collected must be sent to Excel, filling a worksheet.

I simply don't know how to link each button/checkbox to your respective textbox without creating a subroutine for each one! I'll have ~500 subroutines....that's impossible to manage manually....