1 v6 a7 z. F0 I, c2 V. g( Q2.这是request的程序 6 s4 L8 U4 B @! {' s# y7 S// Request a value from Extend1 C0 p J+ e) [& f- q
// p- u% ]4 q8 J0 u8 @ q3 ~// Initialize the variant that will hold the BSTR. Set the variant's - n8 V" [& b) I// type flag to indicate the fact that this variant holds a BSTR. Place the9 s- ~& L( f5 b- ~
// BSTR into the variant structure.9 K+ g. @) {3 E
6 f0 T5 O! V+ h; o requestVariant = (VARIANTARG *)malloc(sizeof(VARIANTARG) *2); 3 C" S& x* ]* O) S V8 \ % u# m5 N! |0 h+ s6 q7 {- H itemStr = SysAllocString((WCHAR *) L"global0:#0:0:0:0:0"); 5 h* V ^, [, w' x) f. {! w. j; H VariantInit(&requestVariant[0]); ) R+ n: |. M& F
requestVariant[0].vt = VT_BSTR; 2 w, m. w" k1 o! `$ g' l1 m- a requestVariant[0].bstrVal = itemStr; 1 x5 @: ]) q8 f3 c- y0 m4 j% \# A: {5 y2 K1 S: S: ]! E) `8 S6 D
topicStr = SysAllocString((WCHAR *) L"system"); 8 }! O& T/ n- o. R; O9 U VariantInit(&requestVariant[1]); $ }, u+ a# R$ B/ S requestVariant[1].vt = VT_BSTR; 1 }1 d! d2 H3 z4 L0 C& F8 n requestVariant[1].bstrVal = topicStr; 4 ^% L2 C ?- k# t$ H+ P6 n+ x, ^) b3 X: `+ R
// Set the DISPPARAMS structure that holds the variant.' K, f) k+ y; [ a. u
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dp2.rgvarg = requestVariant; + ?5 n8 L* p! w, _ dp2.cArgs = 2; ' k7 I0 Y! j) Q8 ~* k. a dp2.rgdispidNamedArgs = NULL;5 {3 B& v; l2 U
dp2.cNamedArgs = 0; : @* ?# ]" y7 D! z 7 y( i7 |) X# b: O7 P- M var.vt = VT_EMPTY; " G: X! |) x8 P; t+ L9 ^- M5 V7 Y6 C a" F$ w. e
// Call IDispatch::Invoke()* X6 p$ n0 d4 O
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hr = m_pDisp->Invoke(# a1 A4 d/ ~: ?. k O& Z
requestID, % @# ^5 a7 K7 F. s9 P IID_NULL, 5 |; d5 _& b- {) s" c LOCALE_SYSTEM_DEFAULT, 8 M5 o) O6 j; h9 E& }7 d1 w DISPATCH_METHOD,8 r0 r4 S' S9 G8 _# W
&dp2,6 Z& c: ?' a h5 w* ~
&var, ~) [5 k$ o& e% Z8 C9 n6 n
&ei,; R! t4 D; q) U; n9 ^& E
&uiErr);+ ^9 L' D; q: `5 I: k