Displaying Player Attack and Damage Rolls before Resolution

There is certainly no requirement that you utilize the D20 dice rolling mechanism, ever.

You can use the program to queue the attack as normal, have your player roll to hit, press the appropriate "hit/miss/confirm/crit" button and have them make the additional rolls as necessary.

I personally use a mixed approach. I allow players to specify (before the outcome is known, obviously) if they want to use manual or automated rolls - any time a dice roll is required.

Some of my players consistently allow the PC to roll initiative and attack; but insist on rolling their own damage. Others let the PC do everything ...

Since you can manually input damage and initiative rolls, and since you can declare any attack to be a hit/miss/crit regardless of the actual number rolled on the dice. you should find that you have complete flexibility to customize the play to your (and your players) satisfaction.

My only caveat, is that I am considering the requirement for all skill checks to be made electronically (for which I will hide the roll results) so that the players will not know if the reason they didn't find a secret door is because there isn't one present or they didn't roll high enough.

 

You can have the players use the Core Dice window. Specifically, go to the Custom Dice and create macros for your to-hit and damage rolls. Then players can roll each individually and you just manually damage the monsters!

http://help.mindgene.com/basics/start-menu/dice

 

Exactly what Daniel said.

So they can add a macro like "Longsword +1 attack" dice would be 1d20+(to hit modifier) example 1d20+14
Then add "Longsword +1 damage": 1d8+7
Then "Longsword +1 crit damage": 2d8+14

now they can roll their attack see their number and wait for the DM to tell if they hit or not.

Then they can roll the correct damage dice then wait for the DM to apply that damage modified by DR and ER to the creature to see if they hurt the monster.

Would take more time to accomplish but if the players want that they can use it, while the DM can use the regular attack system because he just wants the monster to attack do damage and move on.

In my home campaign most of the players actually still roll real dice at the table. We use the system to keep up with the map and hitpoints. While some of our players use d20Pro exclusively.

It is all up to you how you would like to play