我现在用c++编写了一个程序,希望能够和extend交换数据,以及自动对extend进行一些操作。我参阅了例子里的关于OLE AUTOMATION方面的c++程序,但搞得不是很懂。比如说,c++程序向extend发送一个数据:6 _! _/ U3 v: V; I
Name = (WCHAR *) L"Poke"; 7 v' [6 I& o. J9 h) d, e: n ' T" k" `( O m" w! U" F
hr = m_pDisp->GetIDsOfNames ( 2 Y& c( C. r3 K. f w IID_NULL, // reserved$ e: j" l% w8 r" h, A; }' y1 F
&Name, // Array of names to get IDs for / t$ x+ d# Q: O: A) ?( q8 J 1, // # of names in the array1 S7 v1 z0 Q6 V1 X4 _
LOCALE_SYSTEM_DEFAULT, // System locale$ ]- I/ `3 F. ^( V0 Z( \
&pokeID); // Array of IDs to fill on output* H* y( I5 x( a' a' O9 d
5 @4 P' @6 v3 ] [
if (hr) 8 r3 h7 h/ c; o0 f' }, x7 z {) Y+ v) Y2 f {
MessageBox ("Get Poke Unsuccessful"); 3 T C3 P6 p A: C3 J3 Q return;6 k4 L2 P9 b" N! {
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8 v' c/ d. y: r3 `/**************************传递数据给extend**************************************// n( K% Q4 M- m
pokeVariant = (VARIANTARG *)malloc(sizeof(VARIANTARG) *3); / R3 }# L! {& o5 M; J: D 1 j& s5 k- s [
valueStr = SysAllocString((WCHAR *) L"1232"); e. W7 h0 d! E) v, W$ F; \! l VariantInit(&pokeVariant[0]); / T. _$ ]% G; s
pokeVariant[0].vt = VT_BSTR; : l$ I1 }1 y% y pokeVariant[0].bstrVal = valueStr;4 A8 _8 K$ X1 _9 e* h" G; @3 _
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itemStr = SysAllocString((WCHAR *) L"global0:#0:0:0:0:0");, J: F% u0 U3 {5 F# e" H. i3 I
VariantInit(&pokeVariant[1]); 0 B) I' G3 k$ e( E! I6 {9 a pokeVariant[1].vt = VT_BSTR; * B- }$ Y8 u; g! H pokeVariant[1].bstrVal = itemStr; # k! L5 ^, L4 p+ ?/ G4 s # e) i% K C0 I" P2 k! X topicStr = SysAllocString((WCHAR *) L"system");+ g {% t, ]3 g. q' P
VariantInit(&pokeVariant[2]); , j* c" L$ i# t
pokeVariant[2].vt = VT_BSTR; " b. B- X! b' @' {5 y+ @* n4 J1 h7 n3 g pokeVariant[2].bstrVal = topicStr; # \2 F# r8 t# d; F# |) k " k5 ]. M k1 c1 n3 |// Set the DISPPARAMS structure that holds the variant.# g- N% j0 ]( g2 E
5 t% l: T/ C# m$ D! Q+ ]+ m+ e dp.rgvarg = pokeVariant;" Z4 J' R2 ~5 n! a9 V7 I" m
dp.cArgs = 3;1 O( L+ [; O2 Z$ c- g* f/ Z
dp.rgdispidNamedArgs = NULL; `- y1 u/ h. k; i. L; o% Q1 N: k2 Z dp.cNamedArgs = 0; / Q( k9 Y$ ]+ h1 C - |* e, u2 ]! q; ^% l: O// Call IDispatch::Invoke() 5 v0 u' s( M$ w8 E/ ^7 i e0 V- m 3 j2 c* y: M, F hr = m_pDisp->Invoke(4 j ~5 k# t/ G2 J; a
pokeID, % K9 z" x( V/ X8 k$ C$ W- n IID_NULL,' i/ ^& o- B W J$ L
LOCALE_SYSTEM_DEFAULT,- E, U& J, Z( h% q5 s' B' z' v6 N
DISPATCH_METHOD,' V6 `3 u% m) [; {5 d
&dp, 6 c& ?4 K1 e2 Z8 P8 l6 h' i NULL,- k) K% e+ Z! r7 v: q5 F
&ei,0 Q2 B3 f& i, j! O1 {+ o* q$ T! q, q
&uiErr);1 M% S1 q$ n4 L7 Q! E+ h* X+ v
1 v) C' a$ S- r" e9 Z) Q6 b SysFreeString(topicStr); ! J, \ l7 D% e( O4 A, ^ SysFreeString(itemStr);$ {( g2 u4 n& F" n
SysFreeString(valueStr);% P% X1 w+ S$ K7 L
, @% I+ K5 L6 [3 c* o2.这是request的程序 6 H0 T8 a' a, g# j/ Y// Request a value from Extend 6 f* t, K! O" F9 h) V' s( J3 P// ; A W) O& Q) o. b. @% {% B8 |* @// Initialize the variant that will hold the BSTR. Set the variant's # q5 Q, e3 i1 r; q// type flag to indicate the fact that this variant holds a BSTR. Place the 3 {# l6 Y1 ?. |// BSTR into the variant structure. / L* E$ Y* f/ O3 Z6 n0 g! ]- e ' w! B+ V- `6 F( J/ ?$ X1 U+ z requestVariant = (VARIANTARG *)malloc(sizeof(VARIANTARG) *2);& F# [) z: t6 F0 b) G
+ F; Y" N- o0 V3 }2 o itemStr = SysAllocString((WCHAR *) L"global0:#0:0:0:0:0"); 7 p$ W& C# V$ J+ A1 W4 l8 P6 i VariantInit(&requestVariant[0]); 7 m, V! _, f! v1 I! P
requestVariant[0].vt = VT_BSTR;3 q2 |* A& y* q# F2 P5 Z
requestVariant[0].bstrVal = itemStr; 5 q+ g3 \7 q! G + |! }, K/ n# h+ p6 } topicStr = SysAllocString((WCHAR *) L"system"); & X+ H3 A2 a# I6 r# } VariantInit(&requestVariant[1]); 9 \$ u3 n; v3 f( V7 E
requestVariant[1].vt = VT_BSTR;+ }. Z9 I ]' l4 k& Q- X
requestVariant[1].bstrVal = topicStr; 3 b% _ k9 s0 V8 S) q \1 Q : ~2 O1 b! P: ?8 x9 |// Set the DISPPARAMS structure that holds the variant. + [9 X* M' C* s2 h% [' |3 A* n i; i* R! s0 W& i9 {" D
dp2.rgvarg = requestVariant; 7 z; Y$ r8 p1 ~8 n. l dp2.cArgs = 2; x$ r5 n: G/ b8 c" }% | dp2.rgdispidNamedArgs = NULL;1 @# ?2 L/ H( U! `6 {3 N+ Y
dp2.cNamedArgs = 0;) P7 |, ]6 P N& U0 D2 E9 l
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var.vt = VT_EMPTY; + M- d6 Q+ ?# @ j( p! M 1 r. a x( | z$ v, r// Call IDispatch::Invoke()8 O: E, A+ W; g& G7 |
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hr = m_pDisp->Invoke(; e; R3 i3 Z' {
requestID,* r! U, u* A1 g8 E! n
IID_NULL, 5 h6 Q5 \& V' h LOCALE_SYSTEM_DEFAULT, 3 a) q, A. {0 D7 u# O4 f2 O DISPATCH_METHOD,# \# s5 v! [) O2 C7 j+ m! v
&dp2,& X5 a: H& s+ z* ]: h( D e
&var,$ ]1 s: I3 V y1 ], R5 v. V9 l) ^
&ei,% d2 r2 E) A( d& b* C
&uiErr);5 x% Y1 @) L2 s; z l8 p
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SysFreeString(topicStr); 6 d+ |: B4 m3 p$ g( n SysFreeString(itemStr); * E7 ^& c) ~! L d8 z1 G请问该程序是获得extend里面的哪个值?% O5 z$ Q5 M/ b/ ]! ^
如果我希望获得extend程序里面的某个变量的数值,那个c++程序应该如何实现????