Countif formula for n number of rows and columns in macros vba

hi ,

currently i am working n a excel sheet , i need to include an countif formula column after the last column. and the formula should be pasted till the last value in the row.

ex: if three columns are there then count if column should be inserted in d column. Columns counts are varying and also rows count. Countif function to sum the "X" count .

A B C Count if
1 a x 1
2 x x 2
x x x 3

The number of rows are varying. In some some sheets more rows are coming. i am unable to write the macros.

Kindly help me.

Please attach a sample workbook with enough data to make it clear what is needed. Include a BEFORE sheet and an AFTER sheet in the workbook if needed to show the process you're trying to complete or automate. Make sure your desired results are demonstrated, mock them up manually if needed. Remember to desensitize the data.

Click on GO ADVANCED and use the paperclip icon to open the upload window.

View Pic

Note: Please don't attach documents containing confidential data like (address, telephone, ID#s, etc.).