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Win32 SDK函数MessageBox的模拟实现（C语言版）

2013-10-12 15:26 459 查看

版本一：对于使用“掩码”传递参数的方法，简单的实现思路：

#include <stdio.h>

#define MB_OK            0x00000000

#define MB_OKCANCEL 0x00000001

#define MB_ICONHAND 0x00000010

#define MB_ICONQUESTION 0x00000020

#define MAX_RESULT 0xFFFFFFFF

int MessageBox(const char *context, unsigned int type)

{

if(MAX_RESULT == (~MB_ICONHAND | type))

{

printf("\t图标: 信息\t");

}

else if(MAX_RESULT == (~MB_ICONQUESTION | type))

{

printf("\t图标: 问题\t");

}

printf("内容：%s\t", context);

if(MAX_RESULT == (~MB_OKCANCEL | type))

{

printf("按钮：确定 取消\t");

}

else if(MAX_RESULT == ((~MB_OK | type)))

{

printf("按钮：确定\t");

}

putchar('\n');

return 0;

}

int main(int argc, char *argv[])

{

//unsigned int m_o = 0x00000001, m_o1 = 0x00000020, m_o2 = m_o | m_o1;

//printf("%x", ~m_o | m_o2);

MessageBox("hello, world", MB_OK | MB_ICONHAND);

MessageBox("hello, world", MB_OK | MB_ICONQUESTION);

MessageBox("hello, world", MB_OKCANCEL | MB_ICONHAND);

MessageBox("hello, world", MB_OKCANCEL | MB_ICONQUESTION);

printf("---------------------------------------------------\n");

MessageBox("hello, world", MB_OK);

MessageBox("hello, world", MB_OKCANCEL);

MessageBox("hello, world", MB_ICONHAND);

MessageBox("hello, world", MB_ICONQUESTION);

return 0;

}

版本二：充分利用位运算的特性，大大减少了代码量

#include <stdio.h>

#define MB_OK                       0x00000000

#define MB_OKCANCEL             0x00000001

#define MB_ABORTRETRYIGNORE         0x00000002

#define MB_ICONHAND 0x00000010

#define MB_ICONQUESTION 0x00000020

#define MB_TYPEMASK 0x0000000F

#define MB_ICONMASK 0x000000F0

#define MB_VALIDATE 0x00000000

char *TypeText[3] = {{"OK"},{"OK CANCEL"},{"ABORT RETRY IGNORE"}};

char *Icon[2] = {{"ICONHAND"}, {"ICONQUESTION"}};

int MessageBox(const char *context, unsigned int type)

{

printf(TypeText[type & MB_TYPEMASK]);

putchar('\n');

printf("内容：%s\t", context);

putchar('\n');

if((type & MB_ICONMASK) == MB_VALIDATE)

{

printf("\n-------------------------\n");

return -1;

}

printf(Icon[((type & MB_ICONMASK)>>4) - 1]);

printf("\n-------------------------\n");

return 0;

}

int main(int argc, char *argv[])

{

MessageBox("hello, world", MB_OK | MB_ICONHAND);

MessageBox("hello, world", MB_OK | MB_ICONQUESTION);

MessageBox("hello, world", MB_OKCANCEL | MB_ICONHAND);

MessageBox("hello, world", MB_OKCANCEL | MB_ICONQUESTION);

MessageBox("hello, world", MB_OK);

MessageBox("hello, world", MB_OKCANCEL);

MessageBox("hello, world", MB_ICONHAND);

MessageBox("hello, world", MB_ICONQUESTION);

return 0;

}

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标签： Win32 SDK MessageBox 位运算掩码

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