Find Macro To Delete Rows: 3 Questions

I have a worksheet that is several thousand rows long. It is sectioned into various "topics" (e.g. Revenue, Profit); each topic (there are about 100) has 10 companies. The 10 companies are the same for each topic. For instance, if 2 of the companies are Microsoft and Intel, then there will be a Microsoft row and an Intel row within each topic.

I am trying to write some code to delete every instance of a company (the user indicates the company in a form). So, for instance, if I want to delete Microsoft, the user would enter the stock ticker, MSFT, into the form and press the appropriate command button. When the command button is pressed, the code should find each row that contains the ticker MSFT (the tickers happen to be in column B) and delete it.

I have written the following unsuccessful

Private Sub CommandButton1_Click()

Dim Ticker As String
Ticker = TextBox1.Value

'If IsText(Ticker) Then

Range("$A$5").Select


Cells.Find(What:=Ticker, After:=ActiveCell, LookIn:=xlFormulas, _
LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, _
MatchCase:=True, SearchFormat:=False).Activate..........