Windows程序设计（第5版）
windows程序需要调用API。
第一个Windows程序
1 /*HelloMsg.c -- Displays "Hello World!" in a message box*/ 2 #include <Windows.h> 3 4 int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd) 5 { 6 MessageBox(NULL, TEXT("Hello World!"), TEXT("HelloMsg"), 0); 7 return 0; 8 }
头文件：
windows.h 包含了若干其他windows头文件。列举几个最重要、最基本的头文件：
WINDEF.H 基本数据类型定义
WINNT.H 支持Unicode的类型定义
WINBASE.H 内核函数
WINUSER.H 用户界面函数
WINGDI.H 图形设备接口函数
程序入口：
windows程序的入口是WinMain()，在WinBase.h中可以查看
1 WinMain ( 2 _In_ HINSTANCE hInstance, 3 _In_opt_ HINSTANCE hPrevInstance, 4 _In_ LPSTR lpCmdLine, 5 _In_ int nShowCmd 6 );
MessageBox函数：
在WinUser.h中能查看到
1 MessageBox( 2 _In_opt_ HWND hWnd, 3 _In_opt_ LPCSTR lpText, 4 _In_opt_ LPCSTR lpCaption, 5 _In_ UINT uType);
第四个参数，可以使用在WinUser.h中定义的相关常量。
1 /* 2 * MessageBox() Flags 3 */ 4 #define MB_OK 0x00000000L 5 #define MB_OKCANCEL 0x00000001L 6 #define MB_ABORTRETRYIGNORE 0x00000002L 7 #define MB_YESNOCANCEL 0x00000003L 8 #define MB_YESNO 0x00000004L 9 #define MB_RETRYCANCEL 0x00000005L 10 #if(WINVER >= 0x0500) 11 #define MB_CANCELTRYCONTINUE 0x00000006L 12 #endif /* WINVER >= 0x0500 */ 13 14 15 #define MB_ICONHAND 0x00000010L 16 #define MB_ICONQUESTION 0x00000020L 17 #define MB_ICONEXCLAMATION 0x00000030L 18 #define MB_ICONASTERISK 0x00000040L 19 20 #if(WINVER >= 0x0400) 21 #define MB_USERICON 0x00000080L 22 #define MB_ICONWARNING MB_ICONEXCLAMATION 23 #define MB_ICONERROR MB_ICONHAND 24 #endif /* WINVER >= 0x0400 */ 25 26 #define MB_ICONINFORMATION MB_ICONASTERISK 27 #define MB_ICONSTOP MB_ICONHAND 28 29 #define MB_DEFBUTTON1 0x00000000L 30 #define MB_DEFBUTTON2 0x00000100L 31 #define MB_DEFBUTTON3 0x00000200L 32 #if(WINVER >= 0x0400) 33 #define MB_DEFBUTTON4 0x00000300L 34 #endif /* WINVER >= 0x0400 */ 35 36 #define MB_APPLMODAL 0x00000000L 37 #define MB_SYSTEMMODAL 0x00001000L 38 #define MB_TASKMODAL 0x00002000L 39 #if(WINVER >= 0x0400) 40 #define MB_HELP 0x00004000L // Help Button 41 #endif /* WINVER >= 0x0400 */ 42 43 #define MB_NOFOCUS 0x00008000L 44 #define MB_SETFOREGROUND 0x00010000L 45 #define MB_DEFAULT_DESKTOP_ONLY 0x00020000L 46 47 #if(WINVER >= 0x0400) 48 #define MB_TOPMOST 0x00040000L 49 #define MB_RIGHT 0x00080000L 50 #define MB_RTLREADING 0x00100000L 51 52 #endif /* WINVER >= 0x0400 */ 53 54 #ifdef _WIN32_WINNT 55 #if (_WIN32_WINNT >= 0x0400) 56 #define MB_SERVICE_NOTIFICATION 0x00200000L 57 #else 58 #define MB_SERVICE_NOTIFICATION 0x00040000L 59 #endif 60 #define MB_SERVICE_NOTIFICATION_NT3X 0x00040000L 61 #endif 62 63 #define MB_TYPEMASK 0x0000000FL 64 #define MB_ICONMASK 0x000000F0L 65 #define MB_DEFMASK 0x00000F00L 66 #define MB_MODEMASK 0x00003000L 67 #define MB_MISCMASK 0x0000C000L