添加外部“c” ro vc ++表单应用程序 [英] add external "c" ro vc++ forms application

问题描述

我在c ++中有一个控制台应用程序可以运行，但是在VC ++表单应用程序中我得到以下错误，任何想法如何纠正它？

错误：

错误6错误LNK2028：未解析的令牌（0A000013）externCstruct HDC__ * __stdcall GetDC（struct HWND __）（？GetDC @@ $$ J14YGPAUHDC __ @@ PAUHWND __ @@@ Z ）在函数private：void __clrcall sysinfo :: Form1 :: button1_Click（类System :: Object ^，类System :: EventArgs ^）中引用（？button1_Click @ Form1 @ sysinfo @@ $$ FA $ AAMXP $ AAVObject @ System @@ P $ AAVEventArgs @ 4 @@ Z）sysinfo.obj sysinfo



note我已经包含< windows.h>在项目的stdafx.h中

代码

<前lang =c ++> 私人：系统： ：Void button1_Click（System :: Object ^ sender，System :: EventArgs ^ e）{

double i，c，d，f，g，k;
char l;
HDC hdc = GetDC（GetDesktopWindow（））;
DWORD ret = GetDeviceCaps（hdc，HORZSIZE）;
DWORD ret2 = GetDeviceCaps（hdc，VERTSIZE）;
// std :: cout<< 你的屏幕尺寸以英寸为单位<< ret / 25.4<< \x<<< ret2 / 25.4<<\\ n;
ReleaseDC（GetDesktopWindow（），hdc）;

我必须使用hdc等变量？

解决方案

J14YGPAUHDC __ @@ PAUHWND __ @@@ Z）在函数private：void __clrcall sysinfo :: Form1 :: button1_Click（类System :: Object ^，类System :: EventArgs ^）中引用（？button1_Click @ Form1 @sysinfo @@

FA

AAMXP

Hi,
I have a console application in c++ that Works, but in VC++ forms application I get the following errors, any idea how to correct it?
error :
Error 6 error LNK2028: unresolved token (0A000013) "extern "C" struct HDC__ * __stdcall GetDC(struct HWND__ *)" (?GetDC@@$$J14YGPAUHDC__@@PAUHWND__@@@Z) referenced in function "private: void __clrcall sysinfo::Form1::button1_Click(class System::Object ^,class System::EventArgs ^)" (?button1_Click@Form1@sysinfo@@$$FA$AAMXP$AAVObject@System@@P$AAVEventArgs@4@@Z) sysinfo.obj sysinfo

note I have included <windows.h> in stdafx.h of the project
code

private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
			 
			  double i,c,d,f,g,k;
			  char l; 
			  HDC hdc = GetDC(GetDesktopWindow());
    DWORD ret = GetDeviceCaps(hdc, HORZSIZE);
    DWORD ret2 = GetDeviceCaps(hdc, VERTSIZE);
   // std::cout << "Your screen size in inches is " << ret/25.4 << "\" x " << ret2/25.4 << "\" \n";
    ReleaseDC(GetDesktopWindow(), hdc);

I have to use variables for hdc etc.?

解决方案

J14YGPAUHDC__@@PAUHWND__@@@Z) referenced in function "private: void __clrcall sysinfo::Form1::button1_Click(class System::Object ^,class System::EventArgs ^)" (?button1_Click@Form1@sysinfo@@

FA

AAMXP

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