Open Excel from Word using FileDialog - vba

Question

What I want to do is:
Press a button in my Microsoft Word doc it will prompt me to select a document in the file explorer.
Select my document the relevant fields in my word doc will be populated.
This will be populated based upon information in the document (the month) and using a Match function it will search for the correct row/column in the selected excel document and return the value.
I am stuck on the FileDialog(msoFileDialogFilePicker) section of my code below.
For the purpose of my document I can not enter the direct file path, the file path needs to be taken from the FileDialog function (or something similar).
I have also tried GetOpenFilename. I am unsure how to do this. My code currently opens FileDialog and lets me select a file, but I can not pass the file path onto my colNum1 line.
The error I get is Run-time error '91'. Object variable or With Block variable not set.
I am open to suggestions and any help is much appreciated.
Sub KPI_Button()
'
' KPI_Button Macro
Dim objExcel As New Excel.Application
Dim exWb As Excel.Workbook
Dim strFile As String
Dim Doc As String
Dim Res As Integer
Dim dlgSaveAs As FileDialog
Doc = ThisDocument.Name
Set dlgSaveAs = Application.FileDialog(msoFileDialogFilePicker)
Res = dlgSaveAs.Show
colNum1 = WorksheetFunction.Match("(Month)", ActiveWorkbook.Sheets("Sheet1").Range("A2:I2"), 0)
ThisDocument.hoursworkedMonth.Caption = exWb.Sheets("Sheet1").Cells(3, colNum1)
exWb.Close
Set exWb = Nothing
End Sub

Answer 1

try a dialog that specifies an Excel extension as such:
Sub GetNames()
With Application.FileDialog(msoFileDialogFilePicker)
.AllowMultiSelect = False
.Filters.Clear
.Filters.Add "Excel files", "*.xls*", 1
If .Show = True Then
If .SelectedItems.Count > 0 Then
'this is the path you need
MsgBox .SelectedItems(1)
Else
MsgBox "no valid selection"
End If
End If
End With
End Sub