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GeneralRe: graphics.h multi-threading problem Pin
yudhistira dewanata30-Dec-12 6:30
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GeneralRe: graphics.h multi-threading problem Pin
Randor 31-Dec-12 12:14
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GeneralRe: graphics.h multi-threading problem Pin
yudhistira dewanata31-Dec-12 17:48
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QuestionHow to find the similarity between users in Twitter ? Pin
ldaneil27-Dec-12 8:21
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AnswerRe: How to find the similarity between users in Twitter ? Pin
André Kraak27-Dec-12 9:05
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QuestionScrollBar is not Displaying Automatically Pin
yogeshs27-Dec-12 0:01
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AnswerRe: ScrollBar is not Displaying Automatically Pin
April Fans27-Dec-12 15:22
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GeneralRe: ScrollBar is not Displaying Automatically Pin
Richard MacCutchan27-Dec-12 22:38
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Question[SOLVED] Enhanced tool tips for ribbon markup file? Pin
Brandon T. H.26-Dec-12 7:18
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AnswerRe: Enhanced tool tips for ribbon markup file? Pin
Richard MacCutchan27-Dec-12 0:34
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GeneralRe: Enhanced tool tips for ribbon markup file? Pin
Brandon T. H.27-Dec-12 11:12
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GeneralRe: Enhanced tool tips for ribbon markup file? Pin
Richard MacCutchan27-Dec-12 22:33
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QuestionCasting structures - another basic question Pin
Vaclav_Sal24-Dec-12 5:38
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AnswerRe: Casting structures - another basic question Pin
Richard MacCutchan24-Dec-12 6:19
mvpRichard MacCutchan24-Dec-12 6:19 
Casting in C++ does not change anything, it just tells the compiler that the basic type or pointer that you have defined will actually be used to point to something else. It is your responsibility to know what you are doing. Windows messages pass pointers in the WPARAM or LPARAM fields, and you need to cast them to the correct type before you can access the structure that they point to. In your case above, you cast the lParam item to the generic PDEV_BROADCAST_HDR so you can find out what type it is, and then you cast that pointer to the specific structure pointer as defined in the header.
One of these days I'm going to think of a really clever signature.

GeneralSOLVED Casting structures - another basic question Pin
Vaclav_Sal24-Dec-12 9:04
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GeneralRe: SOLVED Casting structures - another basic question Pin
Erudite_Eric2-Jan-13 8:13
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QuestionHow to count pages in PDF file using VC++ Pin
shanmugarajaa23-Dec-12 19:00
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AnswerRe: How to count pages in PDF file using VC++ Pin
Richard MacCutchan23-Dec-12 23:04
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AnswerRe: How to count pages in PDF file using VC++ Pin
Jijo.Raj27-Dec-12 0:29
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QuestionHow to implement C++ raw string literals in VIsual C++ 2010? Pin
Falconapollo22-Dec-12 19:03
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Questionproblems returning/printing poiner Pin
doughyi8u20-Dec-12 15:16
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AnswerRe: problems returning/printing poiner Pin
Jochen Arndt20-Dec-12 22:15
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AnswerRe: problems returning/printing poiner Pin
Richard MacCutchan20-Dec-12 23:47
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GeneralRe: problems returning/printing poiner Pin
Jochen Arndt21-Dec-12 0:07
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GeneralRe: problems returning/printing poiner Pin
Richard MacCutchan21-Dec-12 1:19
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QuestionC++ ownerdrawfixed combobox "header" Pin
NoviceEx19-Dec-12 3:49
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AnswerRe: C++ ownerdrawfixed combobox "header" Pin
jeron119-Dec-12 5:19
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QuestionHow to make a project resolution independent.? Pin
mbatra3119-Dec-12 0:56
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AnswerRe: How to make a project resolution independent.? Pin
Jochen Arndt19-Dec-12 1:29
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GeneralRe: How to make a project resolution independent.? Pin
mbatra3119-Dec-12 1:39
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GeneralRe: How to make a project resolution independent.? Pin
Jochen Arndt19-Dec-12 1:52
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GeneralRe: How to make a project resolution independent.? Pin
mbatra3119-Dec-12 2:25
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GeneralRe: How to make a project resolution independent.? Pin
Jochen Arndt19-Dec-12 2:33
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GeneralRe: How to make a project resolution independent.? Pin
mbatra3119-Dec-12 2:44
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GeneralRe: How to make a project resolution independent.? Pin
Jochen Arndt19-Dec-12 3:06
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AnswerRe: How to make a project resolution independent.? Pin
Alan Balkany19-Dec-12 5:25
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QuestionASM with stams library of C ++ Pin
Gurunathkudalkar18-Dec-12 22:15
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AnswerRe: ASM with stams library of C ++ Pin
CPallini18-Dec-12 23:19
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Questionerror C2228 "must have class/struct/union" Pin
alaaan7318-Dec-12 5:55
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AnswerRe: error C2228 "must have class/struct/union" Pin
Chris Losinger18-Dec-12 6:19
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AnswerRe: error C2228 "must have class/struct/union" Pin
Richard MacCutchan18-Dec-12 8:09
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AnswerRe: error C2228 "must have class/struct/union" Pin
Stefan_Lang21-Dec-12 2:59
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QuestionCan we capture HD video using DirectShow C++/MFC .? Pin
mbatra3118-Dec-12 0:30
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QuestionCWinApp::OnFileNew failed ? Pin
Codzer17-Dec-12 20:23
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GeneralRe: CWinApp::OnFileNew failed ? Pin
Jochen Arndt17-Dec-12 22:33
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GeneralRe: CWinApp::OnFileNew failed ? Pin
Codzer18-Dec-12 3:48
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AnswerRe: CWinApp::OnFileNew failed ? Pin
Jochen Arndt18-Dec-12 4:03
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QuestionLinked List Via Disk File Pin
imboared117-Dec-12 20:01
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SuggestionRe: Linked List Via Disk File Pin
Richard MacCutchan17-Dec-12 23:15
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QuestionConfused with destructor Pin
Super Lloyd17-Dec-12 3:33
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