Saute mushrooms in 3 tablespoons butter in a large skillet over high heat 4 minutes or until tender. Remove from heat, and stir in crabmeat, 1/4 teaspoon salt, and 1/4 teaspoon pepper; set aside.
Melt 1/4 cup butter in a heavy saucepan; add flour, stirring until smooth. Cook 1 minute, stirring constantly. Gradually add whipping cream and wine; cook over medium heat, stirring constantly, until thick. Stir in lemon juice, 1/4 teaspoon salt, and 1/4 teaspoon pepper. Stir in crabmeat mixture and artichoke. Spoon into a buttered shallow 2-quart baking dish.
Combine breadcrumbs, Parmesan cheese, paprika, and remaining 1 tablespoon melted butter. Sprinkle over crabmeat mixture. Bake, uncovered, at 400° for 15 minutes or until lightly browned.