Easy Win 32

Scroll Bar Class – cEasyScrollBar

cEasyScrollBar Public Members:

HWND scrollbar;

cEasyScrollBar Functions:

Functions to modify and/or setup the ScrollBar (HWND scrollbar):

int ChangeScrollBarInstance(HINSTANCE)

int ChangeScrollBarParent(HWND)

int ChangeScrollBarMenu(HMENU)

int ChangeScrollBarPos(int x, int y, int width, int height)

int ChangeScrollBarStyles(DWORD dwstyle,DWORD dwexstyle)

int ChangeScrollBarName(LPCTSTR)

As a general rule this functions return 1 on success, 0 on error.

After Created Functions. (They help to handle the Scroll Bar):

INT GetPos()

Returns the position of the Scroll.

INT SetPos(INT value)

Moves the scroll into the value position.

INT GetRange(INT* MinPos, INT* MaxPos) à Untested Function

Stores the actual range of the ScrollBar into Minpos, and Maxpos.

INT SetRange(INT MinPos, INT MaxPos) à Tested Function

Sets the Range of the scroll bar into the parameters MinPos…MaxPos.

Other Functions:

void InitScrollBar()

Initializes the ScrollBar Class with these values:

lpWindowName="ScrollBar";

dwStyle=0;

x=10;

y=10;

nWidth=300;

nHeight=300;

hWndParent=NULL;

hMenu=NULL;

hInst1=programInstance;

_scrollbarcreated_=FALSE;

HWND Create_ScrollBar(HWND AuxiliarWindow)

On success it returns the handle of the scroll bar (you don’t have to store it, it is already stored in the public class member “scrollbar”).

On error it return NULL.

int Destroy_ScrollBar()

Destroys the ScrollBar. On error returns 0, else non-zero.

LONG GetScrollBarId()

HWND GetScrollBarParent()

DWORD GetScrollBarExStyle()

DWORD GetScrollBarStyle()

HINSTANCE GetScrollBarInstance()

Returns a Scroll Bar property according to the name of the Function.

BOOL Is_Enabled()

void Disable_ScrollBar()

void Enable_ScrollBar()

cEasyScrollBar Private Members:

DWORD dwExStyle; // extended window style

LPCTSTR lpWindowName; // pointer to window name

DWORD dwStyle; // window style

int x; // horizontal position of window

int y; // vertical position of window

int nWidth; // window width

int nHeight; // window height

HWND hWndParent; // handle to parent or owner window

HMENU hMenu; // handle to menu or child-window identifier

HANDLE hInst1; // handle to application instance

BOOL _scrollbarcreated_;