Passing Paramenter To SP For Column Name

I need to select status values form 1 of 4 possible columns, and I need to
pass the column name to select on as a parameter to the stored procedure.
Does anyone have an example of the syntax for the stored procedure?

such as:

CREATE PROCEDURE dbo.sp_Document_Select_ByStatus
(
@SelectColumn nVarChar
)
AS

SET NOCOUNT ON;

SELECT *
FROM Documents
WHERE (@SelectColumn = 0)

The columns to select on are BIT columns.

The error message on the above SP is:

'Syntax error converting the nvarchar value 'P' to a column of data type
int.'

At this point, the passed in parameter is a string "ProducerStatus"

Thanks
Michael