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外文翻译---数据库数据类型.doc

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外文翻译---数据库数据类型.doc

1DATATYPESTHISTOPICLISTSTHEDATATYPESMOSTCOMMONLYUSEDINTHEMICROSOFTFOUNDATIONCLASSLIBRARYMOSTOFTHEDATATYPESAREEXACTLYTHESAMEASTHOSEINTHEWINDOWSSOFTWAREDEVELOPMENTKITSDK,WHILEOTHERSAREUNIQUETOMFCCOMMONLYUSEDWINDOWSSDKANDMFCDATATYPESAREASFOLLOWSBOOLABOOLEANVALUEBSTRA32BITCHARACTERPOINTERBYTEAN8BITINTEGERTHATISNOTSIGNEDCOLORREFA32BITVALUEUSEDASACOLORVALUEDWORDA32BITUNSIGNEDINTEGERORTHEADDRESSOFASEGMENTANDITSASSOCIATEDOFFSETLONGA32BITSIGNEDINTEGERLPARAMA32BITVALUEPASSEDASAPARAMETERTOAWINDOWPROCEDUREORCALLBACKFUNCTIONLPCSTRA32BITPOINTERTOACONSTANTCHARACTERSTRINGLPSTRA32BITPOINTERTOACHARACTERSTRINGLPCTSTRA32BITPOINTERTOACONSTANTCHARACTERSTRINGTHATISPORTABLEFORUNICODEANDDBCSLPTSTRA32BITPOINTERTOACHARACTERSTRINGTHATISPORTABLEFORUNICODEANDDBCSLPVOIDA32BITPOINTERTOANUNSPECIFIEDTYPELRESULTA32BITVALUERETURNEDFROMAWINDOWPROCEDUREORCALLBACKFUNCTIONUINTA16BITUNSIGNEDINTEGERONWINDOWSVERSIONS30AND31;A32BITUNSIGNEDINTEGERONWIN32WNDPROCA32BITPOINTERTOAWINDOWPROCEDUREWORDA16BITUNSIGNEDINTEGERWPARAMAVALUEPASSEDASAPARAMETERTOAWINDOWPROCEDUREORCALLBACKFUNCTION16BITSONWINDOWSVERSIONS30AND31;32BITSONWIN32DATATYPESUNIQUETOTHEMICROSOFTFOUNDATIONCLASSLIBRARYINCLUDETHEFOLLOWINGPOSITIONAVALUEUSEDTODENOTETHEPOSITIONOFANELEMENTINACOLLECTION;USEDBYMFCCOLLECTIONCLASSESLPCRECTA32BITPOINTERTOACONSTANTNONMODIFIABLERECTSTRUCTURECLASSWIZARDSPECIALFORMATCOMMENTSECTIONSHOME|OVERVIEW|HOWDOI|TUTORIALTHISARTICLEEXPLAINSWHEREANDHOWCLASSWIZARDEDITSYOURSOURCEFILESWHENYOUADDANEWCLASSUSINGCLASSWIZARD,SPECIALFORMATCOMMENTSAREPLACEDINYOURCODETOMARKTHESECTIONSOFTHEHEADERANDIMPLEMENTATIONFILESTHATCLASSWIZARDEDITSCLASSWIZARDNEVERMODIFIESCODETHATISOUTSIDETHESECOMMENTEDSECTIONSCLASSWIZARDCREATESTHEFOLLOWINGTYPESOFCOMMENTSINYOURCODEMESSAGEMAPCOMMENTSVIRTUALFUNCTIONCOMMENTSDATAMAPCOMMENTS2FIELDMAPCOMMENTSACTIVEDISPATCHMAPCOMMENTSMESSAGEMAPCOMMENTSFORMOSTCLASSES,THEREARETWORELATEDSECTIONSOFCODETHATCLASSWIZARDEDITSTHEMEMBERFUNCTIONDEFINITIONSINTHECLASSHEADERFILEANDTHEMESSAGEMAPENTRIESINTHECLASSIMPLEMENTATIONFILETHECLASSWIZARDCOMMENTSINTHEHEADERFILELOOKLIKETHIS//{{AFX_MSGCLASSNAMEAFX_MSGVOIDONAPPABOUT;//}}AFX_MSGTHECLASSWIZARDSECTIONINTHEIMPLEMENTATIONFILEISSETOFFWITHCOMMENTSTHATLOOKLIKETHIS//{{AFX_MSG_MAPCLASSNAMEON_COMMANDID_APP_ABOUT,ONAPPABOUT//}}AFX_MSG_MAPTHENOTESINTHECLASSWIZARDSECTIONACTASPLACEHOLDERSCLASSWIZARDREMOVESTHENOTEFROMANYCLASSWIZARDSECTIONINWHICHITWRITESCODEVIRTUALFUNCTIONCOMMENTSASWITHMESSAGEHANDLERS,CLASSWIZARDWRITESCODETOTWOLOCATIONSWHENYOUUSEITTOOVERRIDEAVIRTUALFUNCTIONINONEOFYOURCLASSESTHECLASSWIZARDCOMMENTSINTHEHEADERFILELOOKLIKETHEFOLLOWINGEXAMPLEFORVIRTUALFUNCTIONOVERRIDES//{{AFX_VIRTUALCLASSNAMEVIRTUALBOOLINITINSTANCE;//}}AFX_VIRTUALTHECLASSWIZARDSECTIONINTHEIMPLEMENTATIONFILEHASNOSPECIALCOMMENTSVIRTUALFUNCTIONDEFINITIONSINTHECPPFILELOOKLIKEOTHERFUNCTIONDEFINITIONSDATAMAPCOMMENTSFORDIALOGBOXES,FORMVIEWS,ANDRECORDVIEWS,CLASSWIZARDCREATESANDEDITSTHREEOTHERSECTIONSTHATAREMARKEDWITHSPECIALFORMATCOMMENTSMEMBERVARIABLEDECLARATIONSINTHECLASSHEADERFILE//{{AFX_DATA//}}AFX_DATAMEMBERVARIABLEINITIALIZATIONINTHECLASSIMPLEMENTATIONFILE//{{AFX_DATA_INIT//}}AFX_DATA_INITDATAEXCHANGEMACROSINTHEIMPLEMENTATIONFILE//{{AFX_DATA_MAP//}}AFX_DATA_MAPFIELDMAPCOMMENTS3FORRECORDFIELDEXCHANGE,CLASSWIZARDCREATESANDEDITSTHREEOTHERSECTIONSTHATAREMARKEDWITHSPECIALFORMATCOMMENTSMEMBERVARIABLEDECLARATIONSINTHECLASSHEADERFILE//{{AFX_FIELD//}}AFX_FIELDRECORDEXCHANGEFUNCTIONCALLSINTHEIMPLEMENTATIONFILE//{{AFX_FIELD_MAP//}}AFX_FIELD_MAPMEMBERVARIABLEINITIALIZATIONSINTHECLASSHEADERFILE//{{AFX_FIELD_INIT//}}AFX_FIELD_INITACTIVEDISPATCHMAPCOMMENTSFORACTIVEMETHODDISPATCH,CLASSWIZARDCREATESANDEDITSFOUROTHERSECTIONSTHATAREMARKEDWITHSPECIALFORMATCOMMENTSACTIVEEVENTSINTHECLASSHEADERFILE//{{AFX_EVENT//}}AFX_EVENTACTIVEEVENTSINTHECLASSIMPLEMENTATIONFILE//{{AFX_EVENT_MAP//}}AFX_EVENT_MAPAUTOMATIONDECLARATIONSINTHECLASSHEADERFILE//{{AFX_DISP//}}AFX_DISPAUTOMATIONMAPPINGINTHECLASSIMPLEMENTATIONFILE//{{AFX_DISP_MAP//}}AFX_DISP_MAPFORMOREINFORMATIONSEEWORKINGWITHDIALOGBOXDATAAFX_MSG_MAPREMARKSCLASSWIZARDANDAPPWIZARDINSERTSPECIALLYFORMATTEDCOMMENTDELIMITERSINYOURSOURCECODEFILESTOMARKTHEPLACESINYOURFILESTHATCLASSWIZARDCANWRITETOAFX_MSG_MAPISUSEDTOMARKTHEBEGINNINGANDENDOFMESSAGEMAPENTRIESINACLASS’SMESSAGEMAPINTHECPPFILE//{{AFX_MSG_MAPCLASSNAME//}}AFX_MSG_MAPFORMOREINFORMATION,SEEAFX_MSGCLASSWIZARDSPECIALFORMATCOMMENTSECTIONSHOME|OVERVIEW|HOWDOI|TUTORIALTHISARTICLEEXPLAINSWHEREANDHOWCLASSWIZARDEDITSYOURSOURCEFILESWHENYOUADDANEWCLASSUSINGCLASSWIZARD,SPECIALFORMATCOMMENTSAREPLACEDINYOUR4CODETOMARKTHESECTIONSOFTHEHEADERANDIMPLEMENTATIONFILESTHATCLASSWIZARDEDITSCLASSWIZARDNEVERMODIFIESCODETHATISOUTSIDETHESECOMMENTEDSECTIONSCLASSWIZARDCREATESTHEFOLLOWINGTYPESOFCOMMENTSINYOURCODEMESSAGEMAPCOMMENTSVIRTUALFUNCTIONCOMMENTSDATAMAPCOMMENTSFIELDMAPCOMMENTSACTIVEDISPATCHMAPCOMMENTSMESSAGEMAPCOMMENTSFORMOSTCLASSES,THEREARETWORELATEDSECTIONSOFCODETHATCLASSWIZARDEDITSTHEMEMBERFUNCTIONDEFINITIONSINTHECLASSHEADERFILEANDTHEMESSAGEMAPENTRIESINTHECLASSIMPLEMENTATIONFILETHECLASSWIZARDCOMMENTSINTHEHEADERFILELOOKLIKETHIS//{{AFX_MSGCLASSNAMEAFX_MSGVOIDONAPPABOUT;//}}AFX_MSGTHECLASSWIZARDSECTIONINTHEIMPLEMENTATIONFILEISSETOFFWITHCOMMENTSTHATLOOKLIKETHIS//{{AFX_MSG_MAPCLASSNAMEON_COMMANDID_APP_ABOUT,ONAPPABOUT//}}AFX_MSG_MAPTHENOTESINTHECLASSWIZARDSECTIONACTASPLACEHOLDERSCLASSWIZARDREMOVESTHENOTEFROMANYCLASSWIZARDSECTIONINWHICHITWRITESCODEVIRTUALFUNCTIONCOMMENTSASWITHMESSAGEHANDLERS,CLASSWIZARDWRITESCODETOTWOLOCATIONSWHENYOUUSEITTOOVERRIDEAVIRTUALFUNCTIONINONEOFYOURCLASSESTHECLASSWIZARDCOMMENTSINTHEHEADERFILELOOKLIKETHEFOLLOWINGEXAMPLEFORVIRTUALFUNCTIONOVERRIDES//{{AFX_VIRTUALCLASSNAMEVIRTUALBOOLINITINSTANCE;//}}AFX_VIRTUALTHECLASSWIZARDSECTIONINTHEIMPLEMENTATIONFILEHASNOSPECIALCOMMENTSVIRTUALFUNCTIONDEFINITIONSINTHECPPFILELOOKLIKEOTHERFUNCTIONDEFINITIONSDATAMAPCOMMENTSFORDIALOGBOXES,FORMVIEWS,ANDRECORDVIEWS,CLASSWIZARDCREATESANDEDITSTHREEOTHERSECTIONSTHATAREMARKEDWITHSPECIALFORMATCOMMENTSMEMBERVARIABLEDECLARATIONSINTHECLASSHEADERFILE//{{AFX_DATA//}}AFX_DATAMEMBERVARIABLEINITIALIZATIONINTHECLASSIMPLEMENTATIONFILE

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