Excel VBA Macros validations

Need a validations like below,

e.g. V-b0982

When user enters first character as alphabetic(except capital V) or numeric value or special character -- Validation message should be "First character should be V"
When user enters second character as special character(except -) or numeric value or alphabetic -- Validation message should be "second character should be -"
When user enters third character as special character or numeric value-- Validation message should be "third character should be alphabetic"
When user enters last four characters as special character or alphabetic -- Validation message should be "last four characters should be numeric values"