Creating Scroll Bars

When creating an overlapped, pop-up, or child window, you can add standard scroll bars by using the CreateWindowEx function and specifying WS_HSCROLL, WS_VSCROLL, or both styles. Doing this adds a horizontal or vertical scroll bar, or both, to the window. The following example creates a window with standard horizontal and vertical scroll bars.

hwnd = CreateWindowEx(

0L, /* no extended styles */

"MyAppClass", /* window class */

"Scroll Bar Application", /* text for window title bar */

WS_OVERLAPPEDWINDOW | /* window styles */

WS_HSCROLL |

WS_VSCROLL,

CW_USEDEFAULT, /* default horizontal position */

CW_USEDEFAULT, /* default vertical position */

CW_USEDEFAULT, /* default width */

CW_USEDEFAULT, /* default height */

(HWND) NULL, /* no parent for overlapped windows */

(HMENU) NULL, /* window class menu */

hinst, /* instance owning this window */

(LPVOID) NULL /* pointer not needed */

);

To process scroll bar messages for these scroll bars, you must include appropriate code in the main window procedure.

When using the CreateWindowEx function to create a window, you can add a scroll bar control by specifying the SCROLLBAR window class. This creates a horizontal or vertical scroll bar, depending on whether SBS_HORZ or SBS_VERT is specified as the window style. The scroll bar size and its position relative to its parent window can also be specified. The following example creates a horizontal scroll bar control and positions it in the upper right corner of the window.

hwndScroll = CreateWindowEx(

0L, /* no extended styles */

"SCROLLBAR", /* scroll bar control class */

(LPSTR) NULL, /* text for window title bar */

WS_CHILD | SBS_HORZ, /* scroll bar styles */

0, /* horizontal position */

0, /* vertical position */

200, /* width of the scroll bar */

CW_USEDEFAULT, /* default height */

hwnd, /* handle of main window */

(HMENU) NULL, /* no menu for a scroll bar */

hinst, /* instance owning this window */

(LPVOID) NULL /* pointer not needed */

);

Software for developers

Delphi Components
.Net Components
Software for Android Developers

More information resources

MegaDetailed.Net
Unix Manual Pages
Delphi Examples

Databases for Amazon shops developers

Amazon Categories Database
Browse Nodes Database