|
|
6楼
楼主 |
发表于 2003-10-25 00:48:00
|
只看该作者
谢谢周老师，不过这个问题我自己查了将近一个月的MSDN，终于搞定了。 C3 b, f3 f& k3 ?! r2 v
有一个RasDial拨号函数的定义如下：
+ |2 E4 R8 R" B1 G1 h$ F' ]DWORD RasDial(: Z5 B* L9 @: ]0 ^
LPRASDIALEXTENSIONS dialExtensions,
- v$ s' m$ d0 ]4 m# x9 n7 c. ?LPTSTR phoneBookPath ,
1 m `) u0 c* I( v, P, dLPRASDIALPARAMS rasDialParam ,
& T6 U. d8 ]$ z I* Y9 q/ nDWORD NotifierType,
$ l8 r8 v1 t! q# K, Q/ zLPVOID notifier,
) f% j/ B5 F1 U* t nLPHRASCONN pRasConn );
K' y0 D; y; O2 U* F6 T) u& E* y! j1 z$ a7 O; Y7 H4 {/ S
我的MSDN的解说如下：( Y* s+ {; f% e! D/ t
Parameters
' m. O: l+ J M% `dialExtensions
. e3 [! ?% [/ G1 c; r9 e5 TThis parameter is ignored and should be set to NULL. On Windows CE, RasDial always uses the default behaviors for the RASDIALEXTENSIONS options.
: t, L/ X$ h o J1 h% WphoneBookPath $ ^/ u* z* y: s: {7 P* J% \
This parameter is ignored and should be set to NULL. Dial-up networking stores phone-book entries in the registry rather than in a phone-book file.
& _$ Q6 @5 p3 }# crasDialParam
0 H) H8 B& w% O$ bPointer to a RASDIALPARAMS structure that specifies calling parameters for the RAS connection.
: d* J: N7 S/ c. S" xThe caller must set the RASDIALPARAMS structure’s dwSize member to the sizeof(RASDIALPARAMS) to identify the version of the structure being passed. * L% S* d+ q# ], D3 t1 F/ h
0 c$ \- H2 \, c6 T) }. W
NotifierType
! p9 a8 X: V6 S4 z5 j! uSpecifies the nature of the notifier parameter. If notifier is NULL, NotifierType is ignored. If notifier is not NULL, set NotifierType to the following value:
4 [2 d8 c5 K. k$ c+ U' r6 t6 @- fValue Description . g% V( [! R# b
0xFFFFFFFF! T2 V4 u9 E6 j4 u1 H
0xFFFFFFFF The notifier parameter is a handle to a window to receive progress notification messages. In a progress notification message, wParam indicates the connection state (rasconnstate) which the RAS connection is about to enter, while lParam indicates whether or not an error occurred.
B% o; n+ z. Q$ U( d The progress notification message uses the WM_RASDIALEVENT message code. 6 a* a' P& F9 M
* `5 @( B" A5 [/ g! V' [( M
8 Q! ?4 b/ w* B/ T0 P# a
1 i, ]6 q* J0 [) T2 f
8 s" c) O, f) ^+ Inotifier
* g2 M8 h- J# R; Q$ H" XPointer to a window handle to receive RasDial event notifications. If this parameter is not NULL, RasDial sends the window a message for each RasDial event. Additionally, the RasDial call operates asynchronously: RasDial returns immediately, before the connection is established, and uses the window to communicate its progress. 3 y, r" |3 q% @2 k8 }; m, k
If notifier is NULL, the RasDial call operates synchronously: RasDial does not return until the connection attempt has completed successfully or failed. 3 E- X a! `6 e3 b- T
- q' s# I, J' M2 B$ NIf notifier is not NULL, notifications to the window can occur at any time after the initial call to RasDial. Notifications end when one of the following events occurs:
8 i% `# I# s! Q; I# f* [6 \ ~" R+ g) S/ u* }2 k, [" {
The connection is established. In other words, the RAS connection state is RASCS_Connected.
+ K! {9 V9 W TThe connection fails. In other words, dwError is nonzero.
! @# {! C% I/ n4 DRasHangUp is called on the connection.
4 R. X q& J4 o# eThe callback notifications are made in the context of a thread captured during the initial call to RasDial. 7 _& I5 O' d- w$ @
& z7 j0 s) h& a. l+ J
pRasConn
( x. c6 U: z& E8 A. RPointer to a variable of type HRASCONN. You must set the HRASCONN variable to NULL before calling RasDial. If RasDial succeeds, it stores a handle to the RAS connection into pRasConn. # u* _$ \. M. U. J$ S
Return Values
8 P) t% O3 G IZero indicates success. In addition, the function stores a handle to the RAS connection into the variable pointed to by pRasConn. A nonzero error value, either from the set listed in the RAS header file or ERROR_NOT_ENOUGH_MEMORY, indicates failure.
; H% ~$ l9 p( p, ?. r. U: [/ l f
Include Raserror.h for definitions of the RAS error codes.& x, M" e" [) ~0 |
5 W$ L# a- V- | j, J% q) {8 uRemarks" @( W( q+ D) h+ x- E4 `6 `; o
The szCallBackNumber and szPhoneNumber members of the structure pointed to by rasDialParam are not used and should be set to NULL.& ~9 N+ V# d/ f& u2 F5 I& X' d
' ^! l, Z2 b+ J% d5 i: W2 A# o+ K: Y
RasDial will not automatically display the logon dialog box. This is currently done through the Remote Networking application. Applications are responsible for getting the information from the user.
8 a4 O* E7 e3 V9 W+ N6 _$ [, g+ U+ X
Errors that occur after the immediate return can be detected by RasGetConnectStatus. Data is available until an application calls RasHangUp to hang up the connection. ) C1 _# A$ I7 [+ z
! L8 N) F) O# V2 `# J+ T) X6 X1 w
An application must eventually call RasHangUp whenever a non-NULL connection handle is stored into pRasConn. This applies even if RasDial returns a nonzero (error) value.
* G/ }3 }# N! i# s$ ?! s+ z9 |9 n
) l# _4 Z" {' H! |4 d$ x+ ^" W4 AAn application can safely call RasHangUp from a RasDial notifier handler. If this is done, however, the hangup does not occur until the routine returns. 8 V6 ?9 [% b" o2 l, V3 F6 ^
7 ]9 L9 d8 z) @
The window handle-based notification only works if the underlying configuration supports the PostMessage function. PostMessage is exposed through the msgque component, which is a part of the GWES module. Event notification through a window handle can only work if GWES is part of the underlying configuration. ! c d2 l" S9 I$ D) k( S8 a, \& e
! |" u. I) a8 m& n% w! Q7 O看了好久才算是略略通了一点，要实现我原先预期的效果，首先要用RasDial函数进行拨号" u/ a M& x8 N2 Q$ X* p* ` w; R
DWORD dwRet = RasDial(NULL, NULL, &RasDialParams, 0L, (RASDIALFUNC)RasDialFunc, &hRasConn);
; A9 k" I: P. _* o- W9 m第五个参数是个回调函数，一般都定义如下：
, h$ R3 p; B' N" i+ X( k8 ~7 `9 v( Hvoid WINAPI CDialerDlg::RasDialFunc(UINT unMsg, RASCONNSTATE rasconnstate, DWORD dwError)
; X" t* d& B1 y+ u: N: Y{
1 i3 F4 Z6 L) ^, U CDialerDlg * RasDlg = (CDialerDlg*)AfxGetApp()->m_pMainWnd;
$ D9 M7 l) S4 l/ E8 r7 H
% \; X0 j2 A3 I0 V1 I, C RasDlg-> ostMessage(WM_RASDIALEVENT,(WPARAM)rasconnstate,(LPARAM)dwError);* y/ g# b( n+ P2 q
}; a+ d- X# p" H' s3 Q
这个回调函数将会把拨号的状态POST到各个窗口句柄。 |9 V- a+ j; R9 A4 s
X" N' U. O6 j8 c* X- t% L |
|
/1 
IP卡
狗仔卡
发表于 2003-9-21 10:56:00
QQ好友和群
QQ空间
腾讯微博
腾讯朋友
收藏
分享
顶
踩
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
