#define FORWARD_WM_DRAWCLIPBOARD(hwnd, fn) \
    (void)(fn)((hwnd), WM_DRAWCLIPBOARD, 0, 0L)

/* void Cls_OnPaintClipboard(HWND hwnd, HWND hwndCBViewer, const PAINTSTRUCT FAR* lpPaintStruct) */
#define HANDLE_WM_PAINTCLIPBOARD(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam), (const PAINTSTRUCT FAR*)GlobalLock((HGLOBAL)LOWORD(lParam))), GlobalUnlock((HGLOBAL)LOWORD(lParam)), 0L)
#define FORWARD_WM_PAINTCLIPBOARD(hwnd, hwndCBViewer, lpPaintStruct, fn) \
    (void)(fn)((hwnd), WM_PAINTCLIPBOARD, (WPARAM)(HWND)(hwndCBViewer), (LPARAM)(lpPaintStruct))

/* void Cls_OnSizeClipboard(HWND hwnd, HWND hwndCBViewer, const RECT FAR* lprc); */
#define HANDLE_WM_SIZECLIPBOARD(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam), (const RECT FAR*)GlobalLock((HGLOBAL)LOWORD(lParam))), GlobalUnlock((HGLOBAL)LOWORD(lParam)), 0L)
#define FORWARD_WM_SIZECLIPBOARD(hwnd, hwndCBViewer, lprc, fn) \
    (void)(fn)((hwnd), WM_SIZECLIPBOARD, (WPARAM)(HWND)(hwndCBViewer), (LPARAM)(lprc))

/* void Cls_OnVScrollClipboard(HWND hwnd, HWND hwndCBViewer, UINT code, int pos); */
#define HANDLE_WM_VSCROLLCLIPBOARD(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam), LOWORD(lParam), (int)HIWORD(lParam)), 0L)
#define FORWARD_WM_VSCROLLCLIPBOARD(hwnd, hwndCBViewer, code, pos, fn) \
    (void)(fn)((hwnd), WM_VSCROLLCLIPBOARD, (WPARAM)(HWND)(hwndCBViewer), MAKELPARAM((code), (pos)))

/* void Cls_OnHScrollClipboard(HWND hwnd, HWND hwndCBViewer, UINT code, int pos); */
#define HANDLE_WM_HSCROLLCLIPBOARD(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam), LOWORD(lParam), (int)HIWORD(lParam)), 0L)
#define FORWARD_WM_HSCROLLCLIPBOARD(hwnd, hwndCBViewer, code, pos, fn) \
    (void)(fn)((hwnd), WM_HSCROLLCLIPBOARD, (WPARAM)(HWND)(hwndCBViewer), MAKELPARAM((code), (pos)))

/* void Cls_OnAskCBFormatName(HWND hwnd, int cchMax, LPSTR rgchName); */
#define HANDLE_WM_ASKCBFORMATNAME(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)(wParam), (LPSTR)(lParam)), 0L)
#define FORWARD_WM_ASKCBFORMATNAME(hwnd, cchMax, rgchName, fn) \
    (void)(fn)((hwnd), WM_ASKCBFORMATNAME, (WPARAM)(int)(cchMax), (LPARAM)(rgchName))

/* void Cls_OnChangeCBChain(HWND hwnd, HWND hwndRemove, HWND hwndNext); */
#define HANDLE_WM_CHANGECBCHAIN(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam), (HWND)LOWORD(lParam)), 0L)
#define FORWARD_WM_CHANGECBCHAIN(hwnd, hwndRemove, hwndNext, fn) \
    (void)(fn)((hwnd), WM_CHANGECBCHAIN, (WPARAM)(HWND)(hwndRemove), MAKELPARAM((UINT)(hwndNext), 0))

/* BOOL Cls_OnSetCursor(HWND hwnd, HWND hwndCursor, UINT codeHitTest, UINT msg); */
#define HANDLE_WM_SETCURSOR(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(BOOL)(fn)((hwnd), (HWND)(wParam), (UINT)LOWORD(lParam), (UINT)HIWORD(lParam));
#define FORWARD_WM_SETCURSOR(hwnd, hwndCursor, codeHitTest, msg, fn) \
    (BOOL)(DWORD)(fn)((hwnd), WM_SETCURSOR, (WPARAM)(HWND)(hwndCursor), MAKELPARAM((codeHitTest), (msg)))

/* void Cls_OnSysCommand(HWND hwnd, UINT cmd, int x, int y); */
#define HANDLE_WM_SYSCOMMAND(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (UINT)(wParam), (int)LOWORD(lParam), (int)HIWORD(lParam)), 0L)
#define FORWARD_WM_SYSCOMMAND(hwnd, cmd, x, y, fn) \
    (void)(fn)((hwnd), WM_SYSCOMMAND, (WPARAM)(UINT)(cmd), MAKELPARAM((x), (y)))

/* HWND Cls_MDICreate(HWND hwnd, const MDICREATESTRUCT FAR* lpmcs); */
#define HANDLE_WM_MDICREATE(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(UINT)(fn)((hwnd), (MDICREATESTRUCT FAR*)(lParam))
#define FORWARD_WM_MDICREATE(hwnd, lpmcs, fn) \
    (HWND)(UINT)(DWORD)(fn)((hwnd), WM_MDICREATE, 0, (LPARAM)(lpmcs))

/* void Cls_MDIDestroy(HWND hwnd, HWND hwndDestroy); */
#define HANDLE_WM_MDIDESTROY(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam)), 0L)
#define FORWARD_WM_MDIDESTROY(hwnd, hwndDestroy, fn) \
    (void)(fn)((hwnd), WM_MDIDESTROY, (WPARAM)(hwndDestroy), 0L)

/* NOTE: Usable only by MDI client windows */
/* void Cls_MDIActivate(HWND hwnd, BOOL fActive, HWND hwndActivate, HWND hwndDeactivate); */
#define HANDLE_WM_MDIACTIVATE(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (BOOL)(wParam), (HWND)LOWORD(lParam), (HWND)HIWORD(lParam)), 0L)
#define FORWARD_WM_MDIACTIVATE(hwnd, fActive, hwndActivate, hwndDeactivate, fn) \
    (void)(fn)(hwnd, WM_MDIACTIVATE, (WPARAM)(fActive), MAKELPARAM((hwndActivate), (hwndDeactivate)))

/* void Cls_MDIRestore(HWND hwnd, HWND hwndRestore); */
#define HANDLE_WM_MDIRESTORE(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam)), 0L)
#define FORWARD_WM_MDIRESTORE(hwnd, hwndRestore, fn) \
    (void)(fn)((hwnd), WM_MDIRESTORE, (WPARAM)(hwndRestore), 0L)

/* HWND Cls_MDINext(HWND hwnd, HWND hwndCur, BOOL fPrev); */
#define HANDLE_WM_MDINEXT(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam), (BOOL)LOWORD(lParam)), 0L)
#define FORWARD_WM_MDINEXT(hwnd, hwndCur, fPrev, fn) \
    (HWND)(UINT)(DWORD)(fn)((hwnd), WM_MDINEXT, (WPARAM)(hwndCur), MAKELPARAM((fPrev), 0))

/* void Cls_MDIMaximize(HWND hwnd, HWND hwndMaximize); */
#define HANDLE_WM_MDIMAXIMIZE(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HWND)(wParam)), 0L)
#define FORWARD_WM_MDIMAXIMIZE(hwnd, hwndMaximize, fn) \
    (void)(fn)((hwnd), WM_MDIMAXIMIZE, (WPARAM)(hwndMaximize), 0L)

/* BOOL Cls_MDITile(HWND hwnd, UINT cmd); */
#define HANDLE_WM_MDITILE(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(fn)((hwnd), (UINT)(wParam))
#define FORWARD_WM_MDITILE(hwnd, cmd, fn) \
    (BOOL)(DWORD)(fn)((hwnd), WM_MDITILE, (WPARAM)(cmd), 0L)

/* BOOL Cls_MDICascade(HWND hwnd, UINT cmd); */
#define HANDLE_WM_MDICASCADE(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(fn)((hwnd), (UINT)(wParam))
#define FORWARD_WM_MDICASCADE(hwnd, cmd, fn) \
    (BOOL)(DWORD)(fn)((hwnd), WM_MDICASCADE, (WPARAM)(cmd), 0L)

/* void Cls_MDIIconArrange(HWND hwnd); */
#define HANDLE_WM_MDIICONARRANGE(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_MDIICONARRANGE(hwnd, fn) \
    (void)(fn)((hwnd), WM_MDIICONARRANGE, 0, 0L)

/* HWND Cls_MDIGetActive(HWND hwnd); */
#define HANDLE_WM_MDIGETACTIVE(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(UINT)(fn)(hwnd)
#define FORWARD_WM_MDIGETACTIVE(hwnd, fn) \
    (HWND)(UINT)(DWORD)(fn)((hwnd), WM_MDIGETACTIVE, 0, 0L)

/* HMENU Cls_MDISetMenu(HWND hwnd, BOOL fRefresh, HMENU hmenuFrame, HMENU hmenuWindow); */
#define HANDLE_WM_MDISETMENU(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(UINT)(fn)((hwnd), (BOOL)(wParam), (HMENU)LOWORD(lParam), (HMENU)HIWORD(lParam))
#define FORWARD_WM_MDISETMENU(hwnd, fRefresh, hmenuFrame, hmenuWindow, fn) \
    (HMENU)(UINT)(DWORD)(fn)((hwnd), WM_MDISETMENU, (WPARAM)(fRefresh), MAKELPARAM((hmenuFrame), (hmenuWindow)))

/* void Cls_OnChildActivate(HWND hwnd); */
#define HANDLE_WM_CHILDACTIVATE(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_CHILDACTIVATE(hwnd, fn) \
    (void)(fn)((hwnd), WM_CHILDACTIVATE, 0, 0L)

/* BOOL Cls_OnInitDialog(HWND hwnd, HWND hwndFocus, LPARAM lParam); */
#define HANDLE_WM_INITDIALOG(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(UINT)(BOOL)(fn)((hwnd), (HWND)(wParam), lParam);
#define FORWARD_WM_INITDIALOG(hwnd, hwndFocus, lParam, fn) \
    (BOOL)(DWORD)(fn)((hwnd), WM_INITDIALOG, (WPARAM)(HWND)(hwndFocus), (lParam))

/* HWND Cls_OnNextDlgCtl(HWND hwnd, HWND hwndSetFocus, BOOL fNext) */
#define HANDLE_WM_NEXTDLGCTL(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(UINT)(HWND)(fn)((hwnd), (HWND)(wParam), (BOOL)LOWORD(lParam))
#define FORWARD_WM_NEXTDLGCTL(hwnd, hwndSetFocus, fNext, fn) \
    (HWND)(UINT)(DWORD)(fn)((hwnd), WM_NEXTDLGCTL, (WPARAM)(HWND)(hwndSetFocus), MAKELPARAM((fNext), 0))

/* void Cls_OnParentNotify(HWND hwnd, UINT msg, HWND hwndChild, int idChild); */
#define HANDLE_WM_PARENTNOTIFY(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (UINT)(wParam), (HWND)LOWORD(lParam), (UINT)HIWORD(lParam)), 0L)
#define FORWARD_WM_PARENTNOTIFY(hwnd, msg, hwndChild, idChild, fn) \
    (void)(fn)((hwnd), WM_PARENTNOTIFY, (WPARAM)(UINT)(msg), MAKELPARAM((UINT)(HWND)(hwndChild), (UINT)(idChild)))

/* void Cls_OnEnterIdle(HWND hwnd, UINT source, HWND hwndSource); */
#define HANDLE_WM_ENTERIDLE(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (UINT)(wParam), (HWND)LOWORD(lParam)), 0L)
#define FORWARD_WM_ENTERIDLE(hwnd, source, hwndSource, fn) \
    (void)(fn)((hwnd), WM_ENTERIDLE, (WPARAM)(UINT)(source), MAKELPARAM((UINT)(HWND)(hwndSource), 0))

/* UINT Cls_OnGetDlgCode(HWND hwnd, MSG FAR* lpmsg); */
#define HANDLE_WM_GETDLGCODE(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(UINT)(fn)(hwnd, (MSG FAR*)(lParam))
#define FORWARD_WM_GETDLGCODE(hwnd, lpmsg, fn) \
    (UINT)(DWORD)(fn)((hwnd), WM_GETDLGCODE, (SELECTOROF(lpmsg) ? lpmsg->wParam : 0), (LPARAM)(lpmsg))

/* HBRUSH Cls_OnCtlColor(HWND hwnd, HDC hdc, HWND hwndChild, int type); */
#define HANDLE_WM_CTLCOLOR(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(UINT)(HBRUSH)(fn)((hwnd), (HDC)(wParam), (HWND)LOWORD(lParam), (int)(HIWORD(lParam)))
#define FORWARD_WM_CTLCOLOR(hwnd, hdc, hwndChild, type, fn) \
    (HBRUSH)(UINT)(DWORD)(fn)((hwnd), WM_CTLCOLOR, (WPARAM)(HDC)(hdc), MAKELPARAM((UINT)(HWND)(hwndChild), (UINT)(int)(type)))

/* void Cls_OnSetFont(HWND hwndCtl, HFONT hfont, BOOL fRedraw); */
#define HANDLE_WM_SETFONT(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (HFONT)(wParam), (BOOL)LOWORD(lParam)), 0L)
#define FORWARD_WM_SETFONT(hwnd, hfont, fRedraw, fn) \
    (void)(fn)((hwnd), WM_SETFONT, (WPARAM)(HFONT)(hfont), MAKELPARAM((UINT)(BOOL)(fRedraw), 0))

/* HFONT Cls_OnGetFont(HWND hwnd); */
#define HANDLE_WM_GETFONT(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(UINT)(HFONT)(fn)(hwnd)
#define FORWARD_WM_GETFONT(hwnd, fn) \
    (HFONT)(UINT)(DWORD)(fn)((hwnd), WM_GETFONT, 0, 0L)

/* void Cls_OnDrawItem(HWND hwnd, const DRAWITEMSTRUCT FAR* lpDrawItem); */
#define HANDLE_WM_DRAWITEM(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (const DRAWITEMSTRUCT FAR*)(lParam)), 0L)
#define FORWARD_WM_DRAWITEM(hwnd, lpDrawItem, fn) \
    (void)(fn)((hwnd), WM_DRAWITEM, 0, (LPARAM)(const DRAWITEMSTRUCT FAR*)(lpDrawItem))

/* void Cls_OnMeasureItem(HWND hwnd, MEASUREITEMSTRUCT FAR* lpMeasureItem); */
#define HANDLE_WM_MEASUREITEM(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (MEASUREITEMSTRUCT FAR*)(lParam)), 0L)
#define FORWARD_WM_MEASUREITEM(hwnd, lpMeasureItem, fn) \
    (void)(fn)((hwnd), WM_MEASUREITEM, 0, (LPARAM)(MEASUREITEMSTRUCT FAR*)(lpMeasureItem))

/* void Cls_OnDeleteItem(HWND hwnd, const DELETEITEMSTRUCT FAR* lpDeleteItem) */
#define HANDLE_WM_DELETEITEM(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (const DELETEITEMSTRUCT FAR*)(lParam)), 0L)
#define FORWARD_WM_DELETEITEM(hwnd, lpDeleteItem, fn) \
    (void)(fn)((hwnd), WM_DELETEITEM, 0, (LPARAM)(const DELETEITEMSTRUCT FAR*)(lpDeleteItem))

/* int Cls_OnCompareItem(HWND hwnd, const COMPAREITEMSTRUCT FAR* lpCompareItem); */
#define HANDLE_WM_COMPAREITEM(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(int)(fn)((hwnd), (const COMPAREITEMSTRUCT FAR*)(lParam))
#define FORWARD_WM_COMPAREITEM(hwnd, lpCompareItem, fn) \
    (int)(DWORD)(fn)((hwnd), WM_COMPAREITEM, 0, (LPARAM)(const COMPAREITEMSTRUCT FAR*)(lpCompareItem))

/* int Cls_OnVkeyToItem(HWND hwnd, UINT vk, HWND hwndListbox, int iCaret); */
#define HANDLE_WM_VKEYTOITEM(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(int)(fn)((hwnd), (UINT)(wParam), (HWND)LOWORD(lParam), (int)HIWORD(lParam))
#define FORWARD_WM_VKEYTOITEM(hwnd, vk, hwndListBox, iCaret, fn) \
    (int)(DWORD)(fn)((hwnd), WM_VKEYTOITEM, (WPARAM)(UINT)(vk), MAKELPARAM((UINT)(hwndListBox), (UINT)(iCaret)))

/* int Cls_OnCharToItem(HWND hwnd, UINT ch, HWND hwndListbox, int iCaret); */
#define HANDLE_WM_CHARTOITEM(hwnd, wParam, lParam, fn) \
    (LRESULT)(DWORD)(int)(fn)((hwnd), (UINT)(wParam), (HWND)LOWORD(lParam), (int)HIWORD(lParam))
#define FORWARD_WM_CHARTOITEM(hwnd, ch, hwndListBox, iCaret, fn) \
    (int)(DWORD)(fn)((hwnd), WM_CHARTOITEM, (WPARAM)(UINT)(ch), MAKELPARAM((UINT)(hwndListBox), (UINT)(iCaret)))

/* void Cls_OnQueueSync(HWND hwnd); */
#define HANDLE_WM_QUEUESYNC(hwnd, wParam, lParam, fn) \
    ((fn)(hwnd), 0L)
#define FORWARD_WM_QUEUESYNC(hwnd, fn) \
    (void)(fn)((hwnd), WM_QUEUESYNC, 0, 0L)

/* void Cls_OnCommNotify(HWND hwnd, int cid, UINT flags); */
#define HANDLE_WM_COMMNOTIFY(hwnd, wParam, lParam, fn) \
    ((fn)((hwnd), (int)(wParam), LOWORD(lParam)), 0L)
#define FORWARD_WM_COMMNOTIFY(hwnd, cid, flags, fn) \
    (void)(fn)((hwnd), WM_COMMNOTIFY, (WPARAM)(cid), MAKELPARAM((flags), 0))

/****** Static control message APIs ******************************************/

#define Static_Enable(hwndCtl, fEnable)         EnableWindow((hwndCtl), (fEnable))