Look for "infinitives gerunds English". There's plenty of information which explains the differences between "to use" (infinitive) and "using" (gerund).

Infinitives (to+verb) can be used like a noun, an adjective, or an adverb. Gerunds and the present participle are both verb-ing in form, however, gerunds are used as nouns while participles are used as adjectives. Since both 'using'(gerund) and 'to use' (infinitive ) can be used as a noun, most of the time, they are interchangeable, especially when you use them in the subject position. Ex. To see is to believe. Seeing is believing. Both sentences are correct. Another example: It is nice to meet you. It is nice meeting you.

It depends on the sentence that you need to use. Using and to use differs in the kind of sentence because it can be gerund or infinitive, however in regular sentences using means that you are doing the situation at the moment while to use means that it is more related in the future tense unless you are asking using the verb "use" only.