Hi Gerald,
If you do not want the text portion of ComboBoxAdv to be editable(readonly),You can use DropDownStyle to be the DropDownList where the list always displays, a drop-down list box, and you can select an arrow to view the drop-down.
this.comboBoxAdv1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
Regarding the localization of dateTimePickerAdv,Could you please let me know which version you are using?I checked in our latest version and could see that the localization is done correctly.Please take a look at the screenshot attached.
Let me know if you have any questions on this.
Regards,
Anu.
culture.zip