I am new to WPF and more used to the design of UIs with MFC. I need to create a Window which looks like an old Win32 Api with flat style, that means that all controls are shown without 3D effects. For a TextBox this seems very easy to achieve in order to set the Property BorderThickness to 0. But thats not possible for ComboBoxes. If I change the default Control template for a ComboBox with the help of Expression Blend the first look it gets is very strange (no borders, but small the Toggle button is smaller than before).
Can someone please help me and tell me how to set something like a flat style theme throughout my whole application?