How do I set the size of the ComboBox drop-down box and draw a type Excel worksheet in the drop-down box ???

How do I set the size of the ComboBox drop-down box and draw a type Excel worksheet in the drop-down box ??? Development and Application of VCL Components
Http://www.delphi2007.net/DelphiVCL/html/delphi_20061221121414222.html
Today, I got an exam on this subject.
1. Set the width and height of the ComboBox drop-down box (you need to call the API)
2. Draw a table similar to excel in the ComboBox drop-down box. The form is as follows:
Id school major
01 Peking University Computer Application
02 Tsinghua mathematics
03 Jiaotong University English

Which of the following prawns knows how to help? I am very grateful, brother. I am online.

Combox. Height: = 10;
Combox. Width: = 100;

Combox. Items. Add ('id' + #9 + 'school' + #9 + 'professional ')

Set the height of item?
ListBox. Style: = lbownerdrawfixed;
ListBox. itemheight: = 50;
Or
ListBox. Perform (lb_setitemheight, 0, 50 );

Generate a tstring object. assign a value to the item.

Thanks for your help, but you have misunderstood that the ComboBox item is the table I mentioned above.

The first question has been answered by others.

The second question, I will give you a demonstration Code

Write it temporarily. You can understand it and change it.
Unit unit1;

Interface

Uses
Windows, messages, sysutils, variants, classes, graphics, controls, forms,
Dialogs, stdctrls;

Type
Ttest = record
ID: String [2];
XX: String [4];
ZY: String [4];
End;
Tform1 = Class (tform)
Combox1: tcombobox;
Procedure combobox1drawitem (Control: twincontrol; index: integer;
Rect: trect; State: townerdrawstate );
Procedure formcreate (Sender: tobject );
Private
{Private Declarations}
Public
Arraytest: array [0 .. 2] of ttest;
End;

VaR
Form1: tform1;

Implementation

{$ R *. DFM}

Procedure tform1.combobox1drawitem (Control: twincontrol; index: integer;
Rect: trect; State: townerdrawstate );
Begin
With (control as tcombobox). Canvas do
Begin

Textout (rect. Left, rect. Top, arraytest [Index]. ID );
Textout (rect. Left + 30, rect. Top, arraytest [Index]. xx );
Textout (rect. Left + 70, rect. Top, arraytest [Index]. ZY );
Pen. Color: = clblack;
MoveTo (rect. Left, rect. Top );
Lineto (rect. Right, rect. Top );

MoveTo (rect. Left, rect. Bottom );
Lineto (rect. Right, rect. Bottom );

MoveTo (rect. Left + 26, rect. Top );
Lineto (rect. Left + 26, rect. Bottom );

MoveTo (rect. Left + 65, rect. Top );
Lineto (rect. Left + 65, rect. Bottom );
End;


End;

Procedure tform1.formcreate (Sender: tobject );
Begin
Combobox1.items. Clear;
Arraytest [0]. ID: = '01 ';
Arraytest [0]. XX: = 'peking University ';
Arraytest [0]. ZY: = 'plmm ';
Combobox1.items. Add ('01 ');

Arraytest [1]. ID: = '02 ';
Arraytest [1]. XX: = 'peking University ';
Arraytest [1]. ZY: = 'make ';
Combobox1.items. Add ('02 ');

Arraytest [2]. ID: = '03 ';
Arraytest [2]. XX: = 'bad school ';
Arraytest [2]. ZY: = '**';
Combobox1.items. Add ('03 ');

Combobox1.itemindex: = 0;
End;

End.

The drop-down items are shown in the following table:
Id school major
01 Peking University Computer Application
02 Tsinghua mathematics
03 Jiaotong University English

To: wudi_1982 !)
The first problem is to set the width and height of the item so that the drop-down box can have the upper/lower and left/right scroll bars

The above code forgets a sentence. You need to set it as follows:

Combobox1.style: = csownerdrawfixed;

My current problem is only left. How can I call the API to set the width and height of the ComboBox drop-down box so that a scroll bar appears ????

Learning

Setwindowpos (combobox1.handle, 0, 0, 0,
200, // you can set the width here
600, // height
Swp_nomove or swp_nozorder or swp_noactivate or swp_noredraw or
Swp_hidewindow );

As for the scroll bar
Vertical, when the content of your list is greater than the total number, it will automatically appear
Horizontally, on the basic ComboBox, I don't know how to add

If you fully implement your functions, inherit from the tcombobox class, and write a new component, you can refer to the source code of VCL.

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