error LNK2019: 无法解析的外部符号 _main，该符号在函数 ___tmainCRTStartup 中被引用

[qq_34308518]

#include "windows.h"
#include "stdio.h"
__declspec(dllexport) int snap()
{
HWND hWnd1;
HWND hWnd2;
HWND hWnd3;
HWND hWnd4;
HWND hWnd5;
HWND hWnd6;
HWND hWnd7;
HWND hWnd8;
hWnd1=::FindWindow(NULL,"Silicon Software GmbH - microDisplay 5.1.0 - [SingleAreaGray16.dll -- Board0/DMA0/]");//Silicon Software GmbH - microDisplay 5.1.0
if(hWnd1==NULL)
{
hWnd1=::FindWindow(NULL,"Silicon Software GmbH - microDisplay 5.1.0");
}
hWnd2=::FindWindowEx(hWnd1,NULL,NULL,"qt_central_widget");
hWnd3=::FindWindowEx(hWnd2,NULL,NULL,"mainSplitter");
hWnd4=::FindWindowEx(hWnd3,NULL,NULL,"layout6");
hWnd5=::FindWindowEx(hWnd4,NULL,NULL,"frame3");
hWnd6=::FindWindowEx(hWnd5,NULL,NULL,"cockpittSplitter");
hWnd7=::FindWindowEx(hWnd6,NULL,NULL,"buttonGroupControll_2");
hWnd8=::FindWindowEx(hWnd7,NULL,NULL,"toolButtonCtrlSnap");
if( hWnd8!=NULL)
{
printf("find it!\n");
::SendMessage(hWnd8,WM_LBUTTONDOWN,0,0);
::SendMessage(hWnd8,WM_LBUTTONUP,0,0);
}
else
{
printf("NOT find it!\n");
}
return 0;
}
__declspec(dllexport) int stop()
{
HWND hWnd1;
HWND hWnd2;
HWND hWnd3;
HWND hWnd4;
HWND hWnd5;
HWND hWnd6;
HWND hWnd7;
HWND hWnd8;
hWnd1=::FindWindow(NULL,"Silicon Software GmbH - microDisplay 5.1.0 - [SingleAreaGray16.dll -- Board0/DMA0/]");//Silicon Software GmbH - microDisplay 5.1.0
if(hWnd1==NULL)
{
hWnd1=::FindWindow(NULL,"Silicon Software GmbH - microDisplay 5.1.0");
}
hWnd2=::FindWindowEx(hWnd1,NULL,NULL,"qt_central_widget");
hWnd3=::FindWindowEx(hWnd2,NULL,NULL,"mainSplitter");
hWnd4=::FindWindowEx(hWnd3,NULL,NULL,"layout6");
hWnd5=::FindWindowEx(hWnd4,NULL,NULL,"frame3");
hWnd6=::FindWindowEx(hWnd5,NULL,NULL,"cockpittSplitter");
hWnd7=::FindWindowEx(hWnd6,NULL,NULL,"buttonGroupControll_2");
hWnd8=::FindWindowEx(hWnd7,NULL,NULL,"toolButtonCtrlStop");
if( hWnd8!=NULL)
{
printf("find it!\n");
::SendMessage(hWnd8,WM_LBUTTONDOWN,0,0);
::SendMessage(hWnd8,WM_LBUTTONUP,0,0);
}
return 0;
}

[cocoabird]

没有写主函数吧

[qq_34308518]

引用 1 楼 yuelengdihai 的回复:

没有写主函数吧

主函数？怎么写。。。。。要写那些。。。。。能具体说说？

[qq_34308518]

这段程序是从毕业的师兄那儿拷过来的，老是提示“error LNK2019: 无法解析的外部符号 _main，该符号在函数 ___tmainCRTStartup 中被引用”，网上也查了很多，很多都是说新建项目错了，我看了一下应该都没问题，也把debug删了重新调试，还是提示错了，然后网上查了一下，说可能是头文件出错，当时师兄给的时候就给了一个cpp的文件，我是通过创建项目然后在源文件上右键添加现有项导入的，拜托各给帮忙看看

[gh_99]

新建项目错了. baidu 如何 vs 创建动态链接库。

[qq_33696907]

2019不是经典错误吗，不是声明函数但是没有定义的错误吗？

[qq_34308518]

引用 5 楼 qq_33696907 的回复:

2019不是经典错误吗，不是声明函数但是没有定义的错误吗？

能具体说说吗？