VC創(chuàng)建定時(shí)關(guān)閉的MessageBox.doc

1、第一種方法：用微軟提供的官方文檔From : /kb/181934/en-us/Generally, when you want to display a message box for a limited amount of time, you must implement a regular dialog box that closes itself after a specified amount of time. The problem with this method is that you lose the standard message box functionality that Windows provides. The following example shows how to use the MessageBox function to create a message box that automatically closes after a specified amount of time. Note the following about the example: The example uses a Windows timer that fires an event after the specified amount of time has elapsed. When the timer event occurs, the PostQuitMessage API is used to break out of the modal message loop that MessageBox uses. Note The WM_QUIT message must be removed from the message queue to prevent it from being retrieved in the main message queue. view plaincopy to clipboardprint?1. /* 2. THISCODEANDINFORMATIONISPROVIDEDASISWITHOUTWARRANTYOF 3. ANYKIND,EITHEREXPRESSEDORIMPLIED,INCLUDINGBUTNOTLIMITEDTO 4. THEIMPLIEDWARRANTIESOFMERCHANTABILITYAND/ORFITNESSFORA 5. PARTICULARPURPOSE. 6. 7. Copyright1998MicrosoftCorporation.AllRightsReserved. 8. */9. 10. /* 11. * 12. *MsgBox.c 13. * 14. *Abstract: 15. * 16. *Sampleprogramtodemonstratehowaprogramcandisplaya 17. *timedmessagebox. 18. * 19. */20. 21. #defineSTRICT 22. #include 23. 24. /* 25. * 26. *Overview 27. * 28. *Thekeytocreatingatimedmessageboxisexitingthedialog 29. *boxmessageloopinternaltothemessagebox.Becausethe 30. *messageloopforamessageboxispartofUSER,youcannot 31. *modifythemessageloopwithoutusinghooksandothersuchmethods. 32. * 33. * 34. *However,allmessageloopsexitwhentheyreceivea 35. *WM_QUITmessage.Additionally,ifanestedmessageloop 36. *receivesaWM_QUITmessage,thenestedmessageloopmustbreak 37. *theloopandthenre-postthequitmessagesothatthenext 38. *outerlayercanprocessit. 39. * 40. *Therefore,youcanmakethenestedmessageloopexitby 41. *callingthePostQuitMessagefunction.Thenestedmessageloopwill 42. *cleanupandpostanewquitmessage.WhentheMessageBox 43. *returns,youpeektoseeifthereisaquitmessage.Ifso, 44. *itmeansthatthemessageloopwasabnormallyterminated. 45. *YoualsoconsumetheWM_QUITmessageinsteadofre-postingit 46. *sothattheapplicationcontinuestorun. 47. * 48. *Essentially,youhavetrickedthenestedmessageloopinto 49. *determiningthattheapplicationisterminating.Whenthequitmessage 50. *returns,youconsumethequitmessage.Thismethodeffectivelycancels 51. *thefakequitmessagethatyougenerated. 52. * 53. */54. 55. /* 56. * 57. *Globalvariables 58. * 59. */60. 61. HWNDg_hwndTimedOwner; 62. BOOLg_bTimedOut; 63. 64. /* 65. * 66. *MessageBoxTimer 67. * 68. *Thetimercallbackfunctionthatpoststhefakequitmessage. 69. *Thisfunctioncausesthemessageboxtoexitbecausethemessagebox 70. *hasdeterminedthattheapplicationisexiting. 71. * 72. */73. voidCALLBACKMessageBoxTimer(HWNDhwnd, 74. UINTuiMsg, 75. UINTidEvent, 76. DWORDdwTime) 77. 78. g_bTimedOut=TRUE; 79. if(g_hwndTimedOwner) 80. EnableWindow(g_hwndTimedOwner,TRUE); 81. PostQuitMessage(0); 82. 83. 84. /* 85. * 86. *TimedMessageBox 87. * 88. *ThesameasthestandardMessageBox,exceptthatTimedMessageBox 89. *alsoacceptsatimeout.Iftheuserdoesnotrespondwithinthe 90. *specifiedtimeout,thevalue0isreturnedinsteadofoneofthe 91. *ID*values. 92. * 93. */94. intTimedMessageBox(HWNDhwndOwner, 95. LPCTSTRpszMessage, 96. LPCTSTRpszTitle, 97. UINTflags, 98. DWORDdwTimeout) 99. 100. UINTidTimer; 101. intiResult; 102. 103. g_hwndTimedOwner=NULL; 104. g_bTimedOut=FALSE; 105. 106. if(hwndOwner&IsWindowEnabled(hwndOwner) 107. g_hwndTimedOwner=hwndOwner; 108. 109. /Setatimertodismissthemessagebox. 110. idTimer=SetTimer(NULL,0,dwTimeout,(TIMERPROC)MessageBoxTimer); 111. 112. iResult=MessageBox(hwndOwner,pszMessage,pszTitle,flags); 113. 114. /Finishedwiththetimer. 115. KillTimer(NULL,idTimer); 116. 117. /SeeifthereisaWM_QUITmessageinthequeueifwetimedout. 118. /Eatthemessagesowedonotquitthewholeapplication. 119. if(g_bTimedOut) 120. 121. MSGmsg; 122. PeekMessage(&msg,NULL,WM_QUIT,WM_QUIT,PM_REMOVE); 123. iResult=-1; 124. 125. 126. returniResult; 127. 128. 129. /* 130. * 131. *WinMain 132. * 133. *Programentrypoint.DemonstrateTimedMessageBox(). 134. * 135. */136. intWINAPIWinMain(HINSTANCEhinst, 137. HINSTANCEhinstPrev, 138. LPSTRpszCmdLine, 139. intnCmdShow) 140. 141. 142. UINTuiResult; 143. 144. /Asktheuseraquestion.Givetheuserfivesecondsto 145. /answerthequestion. 146. uiResult=TimedMessageBox(NULL, 147. Doesatrianglehavethreesides?, 148. Quiz, 149. MB_YESNO, 150. /NULLfirstparameterisimportant. 151. 5000); 152. 153. switch(uiResult) 154. caseIDYES: 155. MessageBox(NULL, 156. Thatsright!, 157. Result, 158. MB_OK); 159. break; 160. 161. caseIDNO: 162. MessageBox(NULL, 163. Believeitornot,triangles164. reallydohavethreesides., 165. Result, 166. MB_OK); 167. break; 168. 169. case-1: 170. MessageBox(NULL, 171. Isensedsomehesitationthere.172. ThecorrectanswerisYes., 173. Result, 174. MB_OK); 175. break; 176. 177. 178. return0; 179. 2、第二種方法：使用手動(dòng)創(chuàng)建的對(duì)話框新建一個(gè)對(duì)話框，添加一個(gè)靜態(tài)文本控件（顯示內(nèi)容），如下圖:將Static控件關(guān)聯(lián)CString類型變量為m_strText、并為該對(duì)話框添加新類CMSGBox，再添加WM_TIMER消息：view plaincopy to clipboardprint?1. voidCMSGBox:OnTimer(UINTnIDEvent) 2. 3. /TODO:Addyourmessagehandlercodehereand/orcalldefault 4. if(1=nIDEvent) 5. 6. KillTimer(1); 7. EndDialog(IDOK); 8. 9. CDialog:OnTimer(nIDEvent); 10. PS：我覺(jué)得此處代碼可以改成這樣，就可以設(shè)定多個(gè)定時(shí)器（我可沒(méi)測(cè)試）view plaincopy to clipboardprint?1. voidCMSGBox:OnTimer(UINTnIDEvent) 2. 3. /TODO:Addyourmessagehandlercodehereand/orcalldefault 4. if(nIDE