Update label in word document with value in excel cell

Hello All,
I have been looking for the answer an I couldn't find anything that works, apologies in advance if this issue has been solved here before!
I need excel to open an existing word document (checked!) and update a Label on it with the value in a cell (not checked!). It sound really easy, but I didn't succeed!
I create a word document, go developer / Design Mode / Legacy forms / Text Box (ActiveX control). The Text box will contain the value from the excel cell. Text Box is called TextBox1 and the property I need to pass the excel value from is called "Value"
How can I link excel to the value in the TextBox?
I have the following code:

HTML Code: 

but it fails in the line:
objword.TextBox1.Value = Sheets("Sheet1").Cells(1, 1)
Run-time error 438: Object doesn’t support this property or method
I know it should be something really silly, but I can’t find out, thanks in advance for the help!