Hi there,
The plus sign (+), caret (^), percent sign (%), tilde (~), and parentheses () have special meanings to SendKeys. To specify one of these characters, enclose it within braces ({}). For example, to specify the plus sign, use "{+}". To specify brace characters, use "{{}" and "{}}". Brackets ([ ]) have no special meaning to SendKeys, but you must enclose them in braces.
You can dig out more from here https://learn.microsoft.com/en-us/dotnet/api/system.windows.forms.sendkeys.send?view=netframework-4.8
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