In PM, a control window is a window that an application in conjunction with another window carries out simple input and output task. In DBCS PM, these window controls are enabled to have the capabilities in handling DBCS input and output task. For DBCS input, these window controls can handle the DBCS WM_CHAR message that created by the DBCS keyboard or input method. For DBCS output, unless you change their parameter to apply the SBCS font, these window controls will apply the system default font, and display the DBCS text correctly. They are fully DBCS enabled, so you can use them with small work load in modifying your application program to support DBCS. Yet, some considerations are needed in using them:
The size of the system default font and a display resolution will affect the dialog unit, so a dialog will have different size for different system default font. See the System Default Font for detail.
Since the system default font can be proportional font, if application program wants to change to apply the monospace font in a window control, there are concerns for using monospace font in DBCS PM. See the MBCS Fonts for more information.
This will be discussed in this section.