Currency TextBox

https://www.c-sharpcorner.com/article/display-currency-values-with-a-custom-control/

DateTime

https://www.c-sharpcorner.com/uploadfile/mahesh/maskedtextbox-in-c-sharp/

Error Provider

https://msdn.microsoft.com/en-us/library/system.windows.forms.errorprovider.aspx

Masked TextBox (2004)

https://www.codeproject.com/Articles/1534/Masked-C-TextBox-Control

Masked Edit Control

https://www.codeproject.com/Articles/273/Masked-Edit-Control

Keyboard Input

https://docs.microsoft.com/en-us/dotnet/framework/winforms/how-to-modify-keyboard-input-to-a-standard-control

Masked Edit Nullable (C++)

https://www.codeproject.com/Articles/13766/Nullable-Masked-Edit-and-a-Better-Masked-Edit-Also

TextBox Mask

https://stackoverflow.com/questions/2259850/win-forms-text-box-masks

Custom Masked TextBox (11 Oct 2013)

https://www.codeproject.com/Tips/666932/Using-Masked-TextBox-in-NET

Flex Masked TextBox

https://www.codeproject.com/Articles/4037/FlexMaskEditBox-a-masked-edit-control

Browser in WinForm

https://www.codeproject.com/Articles/7147/WTL-Browser