Check if "Find and Replace" Dialog box is open

Hi,
I use VBA to open the "Find and Replace" Dialog box for reason that's not necessary to explain (I think) using

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My question is how do I check if this dialog box is open or not? That will enable me to decide whether to run a block of code or not.

Thanks in advance

The reason why i need to know is because I have worksheet protection ON. I can't use "Replace All"function (pretty important to have in the worksheet) while Protection is ON. So I want to create a button that will bring up this window and disable protection until the "Replace All" window is closed, then enable protection again.

If you know any other alternative, please share. Thanks