Formal:
* आपकी खबर सुनकर मुझे बहुत खुशी हुई। (Aapki khabar sunkar mujhe bahut khushi hui.) - This is a very formal way to say it, meaning "I am very happy to hear your news."
* आपकी खबर से मैं बहुत खुश हूँ। (Aapki khabar se main bahut khush hoon.) - This is also a formal way to say it, meaning "I am very happy with your news."
Informal:
* तुम्हारी खबर सुनकर बहुत खुशी हुई। (Tumhari khabar sunkar bahut khushi hui.) - This is a more informal way to say it, meaning "I am very happy to hear your news."
* तुम्हारी खबर से मैं बहुत खुश हूँ। (Tumhari khabar se main bahut khush hoon.) - This is also an informal way to say it, meaning "I am very happy with your news."
More Casual:
* तुम्हारी बात सुनकर बहुत अच्छा लगा। (Tumhari baat sunkar bahut achcha laga.) - This is a very casual way to say it, meaning "I felt very good hearing your news."
The best way to say it depends on the context and your relationship with the person you are talking to.