How to view the height of the drop-down list of the table combo box (zz)

Today, when I use MFC to write a tool software, I use a dynamically created combo box. When there are many menu items in the combo box, the drop-down menu height of the default combo box is insufficient. To change the height of the default drop-down menu to a proper position, perform the following operations:

Crect RC;
Newcombo. getdroppedcontrolrect (& rc );
Newcombo. getparent ()-> screentoclient (& rc );
RC. Bottom + = 150;
Newcombo. movewindow (& rc );

In this way, the height of the default drop-down menu is changed. newcombo is a dynamically created combo box.