Taskbar size

Intercept the WM_SETTINGCHANGE message.

This message is sent when a system setting has changed, and among these settings, is the size of the desktop working area (SPI_SETWORKAREA parameter of SystemParametersInfo API).

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/wm_settingchange.asp
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/sysinfo/base/systemparametersinfo.asp

Thanks a lot. It helped me.

I have one more doubt...

How can we find the desktop changed rectangle area? That means only the rectangle that changed in the desktop.


Thanks in advance
sasinair

// example
RECT rct;
long lResult = SystemParametersInfo(SPI_GETWORKAREA, NULL, &rct, 0)

this gives you the work area in a rectangle.

fResult = (BOOL) SHAppBarMessage(ABM_GETTASKBARPOS, pabd);

where pabd is a pointer to a struct like this
typedef struct _AppBarData {
    DWORD  cbSize;
    HWND   hWnd;
    UINT   uCallbackMessage;
    UINT   uEdge;
    RECT   rc;
    LPARAM lParam;
} APPBARDATA, *PAPPBARDATA;

use rc to get the bounding rectangle of the taskbar (that's screen coordinates)

then you can do some math between the work area rect and taskbar Rect

but I would think that if the taskbar has changed, the Work area rect tells you where the Taskbar is not.
So you could resize your app to fit that area.

hope that helps,
J