Pass argument in view from custom form I have a view content page. I want to filters its content on the base of a custom form data.
So how we can pass or filter a view content using custom form data there?

View is built on node. In this particular node we have a field type select list.
The same select list we have created in our form. Now what ever option is selected in form, we want to use it's value in view.
We also do not have idea how to use its value.
Assuming the custom form sits in its own page. You can rewrite the output of the field, using replacement patterns, in the view to pass the required information as part of the url. 

Then using hook_menu, define parameters to pass to the form 

function hello_world_menu() {
  $items=array();
  $items['hello_world/%/%'] = array (
    'title' =&gt; 'My Custom Form',
    'page callback' =&gt; 'hello_world_form_function',
    'page arguments' =&gt; array(1,2),
    'access callback' =&gt; TRUE,
    'type' =&gt; MENU_CALLBACK,
);
return $items;
}