@GastonHi Gaston,
The code has been updated with the problem solving. Please have a try. Sorry for the inconvenience and thank you for your comment.

@henryHi Henry,
The code has been updated with the problem solving. Please have a try. Sorry for the inconvenience and thank you for your comment.

@MHi,
If there are merged cells in the specified range, please try the following code.

Dim mRg As Range
Dim mStr As String

Private Sub Worksheet_BeforeDoubleClick(ByVal Target As Range, Cancel As Boolean)
If Not Intersect(Range("A1:F8"), Target) Is Nothing Then
Set mRg = Target.Item(1)
mStr = mRg.Value
End If
End Sub
Private Sub Worksheet_Change(ByVal Target As Range)
Dim xRg As Range
On Error Resume Next
Set xRg = Intersect(Range("A1:F8"), Target)
If xRg Is Nothing Then Exit Sub
Target.Worksheet.Unprotect Password:="123"
If xRg.Value <> mStr Then xRg.MergeArea.Locked = True
Target.Worksheet.Protect Password:="123"
End Sub
Private Sub Worksheet_SelectionChange(ByVal Target As Range)
If Not Intersect(Range("A1:F8"), Target) Is Nothing Then
Set mRg = Target.Item(1)
mStr = mRg.Value
End If
End Sub

@Cedric IsraelsohnHi,
The below VBA code can help you. Thank you for your comment.

Dim xRg As Range
'Update by Extendoffice 2018/3/7
Private Sub Worksheet_Change(ByVal Target As Range)
On Error Resume Next
If Target.Cells.Count > 1 Then Exit Sub
Set xRg = Intersect(Range("D7"), Target)
If xRg Is Nothing Then Exit Sub
If Target.Value = "test" Then
Call Mail_small_Text_Outlook
End If
End Sub
Sub Mail_small_Text_Outlook()
Dim xOutApp As Object
Dim xOutMail As Object
Dim xMailBody As String
Set xOutApp = CreateObject("Outlook.Application")
Set xOutMail = xOutApp.CreateItem(0)
xMailBody = "Hi there" & vbNewLine & vbNewLine & _
"This is line 1" & vbNewLine & _
...

@SonuHi,
You can try the below VBA code.

Private Sub Worksheet_Change(ByVal Target As Range)
Dim xRgSel As Range
Dim xOutApp As Object
Dim xMailItem As Object
Dim xMailBody As String
On Error Resume Next
Application.ScreenUpdating = False
Application.DisplayAlerts = False
Set xRg = Range("A2:E11")
Set xRgSel = Intersect(Target, xRg)
ActiveWorkbook.Save
If Not xRgSel Is Nothing Then
Set xOutApp = CreateObject("Outlook.Application")
Set xMailItem = xOutApp.CreateItem(0)
xMailBody = "Cell(s) " & xRgSel.Address(False, False) & _
xRgSel.Value & _
" in the worksheet '" & Me.Name & "' were modified on ...

@AdamHi Adam,
The below VBA code can help you solve the problem.
You need to replace the "Sheet4" and "A1:C17" in the code with your specified sheet and range.

Private Sub CommandButton1_Click()
Dim xSWName As String
Dim xSheet As Worksheet
Dim xPSheet As Worksheet
Dim xIntR As Integer
xSWName = "Sheet4"
On Error Resume Next
Application.ScreenUpdating = False
Set xSheet = ActiveSheet
If xSheet.Name <> "Definitions" And xSheet.Name <> "fx" And xSheet.Name <> "Needs" Then
xSheet.Range("A1:C17 ").Copy
Set xPSheet = Worksheets.Item(xSWName)
xIntR = xPSheet.UsedRange.Rows.count
xPSheet.Cells(xIntR + 1, 1).PasteSpecial Paste:=xlValues, Operation:=xlNone, SkipBlanks:=False, Transpose:=False
...

@Troy HavardI should probably have also noted that I get a #NAME? error in the cell in which I try to use the function.

I've copied and pasted as stated and have used this formula for over a year but recently saved the workbook to a new name and now the function doesn't work! I can't figure out what the deal is and I'm losing hair and sleep over it! Loading the original workbook, the formula works like a charm but going back to the new one, it doesn't! I've loaded VBA and tried re-creating the function but it doesn't work. Using Office 2019 - any help appreciated.

@JHello,
Add the date modified column for the imported filenames, please apply the following VBA code, please try it, hope it can help you!

Sub GetFileList()
Dim xFSO As Object
Dim xFolder As Object
Dim xFile As Object
Dim xFiDialog As FileDialog
Dim xPath As String
Dim i As Integer
Set xFiDialog = Application.FileDialog(msoFileDialogFolderPicker)
If xFiDialog.Show = -1 Then
xPath = xFiDialog.SelectedItems(1)
End If
Set xFiDialog = Nothing
If xPath = "" Then Exit Sub
Set xFSO = CreateObject("Scripting.FileSystemObject")
Set xFolder = xFSO.GetFolder(xPath)
ActiveSheet.Cells(1, 1) = "Folder name"
ActiveSheet.Cells(1, 2) = "File name"
ActiveSheet.Cells(1, 3) = "File ...

@AceHi, Ace,
To delete the text based on another column cell, the below vba code may help you, please try it.
Sub DeleteStr()
Dim xStr As String
Dim xRg As Range
Dim xTxt As String
Dim xCell As Range
Dim xChar As String
Dim i As Long
Dim J As Long
On Error Resume Next
If ActiveWindow.RangeSelection.Count > 1 Then
xTxt = ActiveWindow.RangeSelection.AddressLocal
Else
xTxt = ActiveSheet.UsedRange.AddressLocal
End If
LInput:
Set xRg = Application.InputBox("please select the data range:", "Kutools for Excel", xTxt, , , , , 8)
If xRg Is Nothing Then Exit Sub
If xRg.Areas.Count > 1 Then
...