BOOL DlgDirSelectComboBox(HWND hDlg, LPSTR lpString, int nIDComboBox)This section documents other miscellaneous changes in the USER function.
Two existing win3 functions take string pointers but do not have maximum string length parameters. These are being added.
BOOL DlgDirSelectComboBox(HWND hDlg, LPSTR lpString, int nIDComboBox)
BOOL DlgDirSelect(HWND hDlg, LPSTR lpString, int nIDComboBox)
these both change to:
BOOL DlgDirSelectComboBoxEx(HWND hDlg, LPSTR lpString, WORD nLength, int nIDComboBox)
BOOL DlgDirSelectEx(HWND hDlg, LPSTR lpString, WORD nLength, int nIDComboBox)
These functions will no longer be supported:
EnableHardwareInput (no replacement)
SetMessageQueue (not needed since msg queues size dynamically)
SetSysModalWindow (no replacement)
GetSysModalWindow (no replacement)
GetKBCodepage (no replacement)
GetKeyboardType (no replacement)
GetWindowTask (being replaced by GetWindowThreadProcessID)
This needs to change to allow more information to be passed through window messages. Now that handles are 32 bit entities, more room is needed. This also affected the packing of some messages, which needed rearranging:
WM_ACTIVATE
Old:
wParam: state
lParam: fMinimized, hwnd
New:
wParam: state, fMinimized
lParam: hwnd
WM_CHARTOITEM
Old:
wParam: char
lParam: pos, hwnd
New:
wParam: char, pos
lParam: hwnd
WM_COMMAND
Old:
wParam: id
lParam: hwnd, cmd
New:
wParam: id, cmd
lParam: hwnd
WM_CTLCOLOR
Old:
wParam: hdc
lParam: hwnd, type
New:
WM_CTLCOLORBTN
WM_CTLCOLORDLG
WM_CTLCOLORLISTBOX
WM_CTLCOLORMSGBOX
WM_CTLCOLORSCROLLBAR
WM_CTLCOLORSTATIC
WM_CTLCOLOREDIT
wParam: hdc
lParam: hwnd
WM_MENUSELECT
Old:
wParam: cmd
lParam: flags, hMenu
New:
wParam: cmd, flags
lParam: hMenu
WM_MDIACTIVATE (when the message is sent to the MDI client window)
no change.
WM_MDIACTIVATE (when the client window sends this message to the MDI child)
Old:
wParam: fActivate
lParam: hwndDeactivate, hwndActivate
New:
wParam: hwndActivate
lParam: hwndDeactivate
WM_MDISETMENU
Old:
wParam: 0
lParam: hMenuFrame, hMenuWindow
New:
wParam: hMenuFrame
lParam: hMenuWindow
WM_MENUCHAR
Old:
wParam: char
lParam: hMenu, fMenu
New:
wParam: char, fMenu
lParam: hMenu
WM_PARENTNOTIFY (also has two cases)
Old case #1:
wParam: msg
lParam: id, hwndChild
New case #1:
wParam: msg, id
lParam: hwndChild
Old case #2:
wParam: msg
lParam: x, y
New case #2:
wParam: msg
lParam: x, y
WM_VKEYTOITEM
Old:
wParam: code
lParam item, hwnd
New:
wParam: code, item
lParam: hwnd
EM_GETSEL
Old:
returns (wStart, wEnd)
wParam: NULL
lParam: NULL
New:
returns (wStart, wEnd)
wParam: lpdwStart or NULL
lParam: lpdwEnd or NULL
EM_LINESCROLL
Old:
wParam: 0
lParam: nLinesVert, nLinesHorz
New:
wParam: nLinesHorz
lParam: nLinesVert
EM_SETSEL
Old:
wParam: 0
lParam: wStart, wEnd
New:
wParam: wStart
lParam: wEnd
WM_HSCROLL:
WM_VSCROLL:
Old:
wParam: code
lParam: pos, hwnd
New:
wParam: code, pos
lParam: hwnd
WM_DDE_ACK (Posted form only – Sent form is unchanged)
Old:
wParam:hwnd
lParam:wStatus, aItem or wStatus, hCommands
New:
wParam:hwnd
lParam:hDdeAck
typedef struct DDEACKSTRUCT {
UINT wStatus;
UINT aItemORhCommands;
} DDEACKSTRUCT;
WM_DDE_ADVISE
Old:
wParam: hwnd
lParam: hOptions, aItem
New:
wParam: hwnd
lParam: hDdeAdvise
typedef struct _DDEADVISESTRUCT {
HANDLE hOptions;
UINT#ATOM aItem;
} DDEADVISESTRUCT;
WM_DDE_DATA
Old:
wParam: hwnd
lParam: hData, aItem
New:
wParam: hwnd
lParam: hDdeData
typedef struct _DDEDATASTRUCT {
HANDLE hData;
UINT#ATOM aItem;
} DDEDATASTRUCT;
WM_DDE_POKE
Old:
wParam: hwnd
lParam: hData, aItem
New:
wParam: hwnd
lParam: hDdePoke
typedef struct _DDEPOKESTRUCT {
HANDLE hData;
UINT#ATOM aItem;
} DDEPOKESTRUCT;Callback Function:
LPSTR WordBreakFunc(
LPSTR lpchEditText,
DWORD ichCurrentWord,
DWORD cbEditText);
Description
This is the callback function that edit controls call in order to determine where to break words apart from other words.
| Parameter | Description |
| lpchEditText | points to the text string in question. |
| ichCurrentWord | Specifies the starting position of the current word. |
| cbEditText | Specifies the length of the buffer in bytes pointed to by lpchEditText . |
Returns a pointer to the next word position.
GetClassWord / GetWindowWord under Win3 return handles to these return types:
GCW_HBRBACKGROUND
GCW_HCURSOR
GCW_HICON
GCW_HMODULE
GWW_HINSTANCE
GWW_HWNDPARENT
Handles are 32 bits under Win32. This is a place where Win3 has hardwired these types to words. Under Win32, these GWW_ and GCW_ types that return handles are no longer valid – they have been changed to GWL_ and GCL_ with the same name suffix.