ColdFusion datasource within a <cfquery> tag not working

I'm new to ColdFusion. I added a new data source called "coldfusionproject" in CF Administrator. Screenshot of Connected Data Sources in CF Administrator

As you can see, the status is "OK".

However, when I use the datasource = "coldfusionproject" attribute within a <cfquery>, I get the error that states datasource "coldfusionproject" could not be found.

My <cfquery> tag in my code looks like this ("username" and "password" values are actually the values for my local MySQL Server dB):

<cfquery datasource = "coldfusionproject" username = "root" password = "admin">

Any ideas? I'm not sure why it's not finding the data source I created in CF Admin.

I believe I solved my own problem. I created an application.cfc file (thanks @Adam Cameron in the comments), and added this code:

<cfscript>

component {

this.name = "coldfusionproject";

this.datasources = {
        coldfusionproject = {

            database    = "cold_fusion",
            host        = "127.0.0.1",
            port        = "3006",
            driver      = "MySQL5",
            username    = "root",
            password    = "pw"
        }
    };

    this.datasource = "coldfusionproject";  
}

</cfscript>

My app was then able to connect to my local database without errors.