截图C ++ cli [英] Taking a screenshot C++ cli
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问题描述
我看到过以下代码，它截取屏幕截图并将其保存为jpg，我已经设法编译并运行它作为win32 CONSOLE应用程序，
我试图使用下面的代码在WindowsForm / CLI（只有一个按钮，应该截图）项目，我有以下错误：
1> screenshoter.obj：warning LNK4248：未解析的typeref令牌（0100002C）为'Gdiplus.GpCachedBitmap';映像可能无法运行
1> screenshoter.obj：error LNK2028：未解析的令牌（0A000017）externCint __stdcall ReleaseDC（struct HWND__ *，struct HDC__ *）（？ReleaseDC @@ $$ J18YGHPAUHWND __ @@函数private：void __clrcall screenshoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）引用的函数PAUHDC __ @@@ Z）
1> screenshoter.obj：错误LNK2028：在函数private：void __clrcall中引用的未解析的标记（0A000018）externCint __stdcall DeleteObject（void *）（？DeleteObject @@ $$ J14YGHPAX @ Z）screenshoter :: Form1 :: gdiscreen（void） （？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2028：未解析的标记（0A000019）externCint __stdcall BitBlt（struct HDC__ *，int，int ，int，int，struct HDC__ *，int，int，unsigned long）（？BitBlt @@ $$ J236YGHPAUHDC __ @@ HHHH0HHK @ Z）在函数private：void __clrcall screenshter :: Form1 :: gdiscreen（void） （？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2028：unresolved token（0A00001A）externCvoid * __stdcall SelectObject（struct HDC__ *，void *） void？__clrcall screenshoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）引用的（？SelectObject @@ $$ J18YGPAXPAUHDC __ @@ PAX @ Z）
1> screenshoter.obj：error LNK2028：未解析的标记（0A00001B）externCstruct HBITMAP__ * __stdcall CreateCompatibleBitmap（struct HDC__ *，int，int）（？CreateCompatibleBitmap @@ $$ J212YGPAUHBITMAP __ @@ PAUHDC __ @@ HH @ Z）引用函数private：void __clrcall screenshoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2028 ：function unsigned char（0A00001C）：在函数private：void __clrcall中引用的未解析的标记（0A00001C）externCstruct HDC__ * __stdcall CreateCompatibleDC（struct HDC__ *）（？CreateCompatibleDC @@ $$ J14YGPAUHDC __ @@ PAU1 @ ：gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2028：unresolved token（0A00001D）externCint __stdcall GetSystemMetrics（int） void？__clrcall screenshoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
（？GetSystemMetrics @@ $$ J14YGHH @ Z） 1> screenshoter.obj：error LNK2028：未解析的令牌（0A00001E）externCstruct HDC__ * __stdcall GetDC（struct HWND__ *）（？GetDC @@ $$ J14YGPAUHDC __ @@ PAUHWND __ @@@ Z） private：void __clrcall screenshoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2019：未解析的外部符号externC void __clrcall screenshoter :: Form1 :: gdiscreen（void）（）中引用的int __stdcall ReleaseDC（struct HWND__ *，struct HDC__ *）（？ReleaseDC @@ $$ J18YGHPAUHWND __ @@ PAUHDC __ @@@ Z） ？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2019：未解析的外部符号externCint __stdcall DeleteObject（void *）（？DeleteObject @@ $$在函数private：void __clrcall screenshoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）引用的函数J4YGHPAX @ Z）
1> screenshoter.obj：error LNK2019 ：未解析的外部符号externCint __stdcall BitBlt（struct HDC__ *，int，int，int，int，struct HDC__ *，int，int，unsigned long）（？BitBlt @@ $$ J236YGHPAUHDC __ @ HHHH0HHK @ Z ）在函数private：void __clrcall中引用的函数screenhoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2019：unresolved external符号externCvoid * __stdcall SelectObject（struct HDC__ *，void *）（？SelectObject @@ $$ J18YGPAXPAUHDC __ @@ PAX @ Z）引用函数private：void __clrcall screenshoter :: Form1 :: gdiscreen ）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2019：未解析的外部符号externCstruct HBITMAP__ * __stdcall CreateCompatibleBitmap（struct HDC__ *，int，在函数private：void __clrcall screenshoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$）中引用的函数int（）CreateCompatibleBitmap @@ $$ J212YGPAUHBITMAP __ @@ PAUHDC __ @@ HH @ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2019：未解析的外部符号externCstruct HDC__ * __stdcall CreateCompatibleDC（struct HDC__ *）（？CreateCompatibleDC @@ $$ J14YGPAUHDC __ @@ PAU1 @@ Z ）在函数private：void __clrcall中引用的函数screenhoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2019：unresolved external在函数private：void __clrcall screenshoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter）中引用的符号externCint __stdcall GetSystemMetrics（int）（？GetSystemMetrics @@ $$ J14YGHH @ @@ $$ FA $ AAMXXZ）
1> screenshoter.obj：error LNK2019：未解析的外部符号externCstruct HDC__ * __stdcall GetDC（struct HWND__ *）（？GetDC @@ $$ J14YGPAUHDC __ @@在函数private：void __clrcall screenshoter :: Form1 :: gdiscreen（void）（？gdiscreen @ Form1 @ screenshoter @@ $$ FA $ AAMXXZ）中引用的PAUHWND __ @@@ Z）
注意：我已包含所有需要的文件
我在MSDN中查找，但我真的不能理解错误messeges。此外，我曾经遇到过类似的消息，我解决了，但添加了一个.lib文件
这次我尝试添加，但是没有解决问题
#pragma comment（lib，GdiPlus.lib）
解决方案这些函数在gdi32.lib - 不是gdiplus.lib - 中声明，有些可能在user32.lib。
I've seen the following code that takes a screenshot and saves it as jpg, I've managed to compile and run it as win32 CONSOLE application,
But when I tried to use the following code in A windowsForm/CLI (there is just a button that should take a screenshot) project, I got the following errors:
1>screenshoter.obj : warning LNK4248: unresolved typeref token (0100002C) for 'Gdiplus.GpCachedBitmap'; image may not run 1>screenshoter.obj : error LNK2028: unresolved token (0A000017) "extern "C" int __stdcall ReleaseDC(struct HWND__ *,struct HDC__ *)" (?ReleaseDC@@$$J18YGHPAUHWND__@@PAUHDC__@@@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2028: unresolved token (0A000018) "extern "C" int __stdcall DeleteObject(void *)" (?DeleteObject@@$$J14YGHPAX@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2028: unresolved token (0A000019) "extern "C" int __stdcall BitBlt(struct HDC__ *,int,int,int,int,struct HDC__ *,int,int,unsigned long)" (?BitBlt@@$$J236YGHPAUHDC__@@HHHH0HHK@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2028: unresolved token (0A00001A) "extern "C" void * __stdcall SelectObject(struct HDC__ *,void *)" (?SelectObject@@$$J18YGPAXPAUHDC__@@PAX@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2028: unresolved token (0A00001B) "extern "C" struct HBITMAP__ * __stdcall CreateCompatibleBitmap(struct HDC__ *,int,int)" (?CreateCompatibleBitmap@@$$J212YGPAUHBITMAP__@@PAUHDC__@@HH@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2028: unresolved token (0A00001C) "extern "C" struct HDC__ * __stdcall CreateCompatibleDC(struct HDC__ *)" (?CreateCompatibleDC@@$$J14YGPAUHDC__@@PAU1@@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2028: unresolved token (0A00001D) "extern "C" int __stdcall GetSystemMetrics(int)" (?GetSystemMetrics@@$$J14YGHH@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2028: unresolved token (0A00001E) "extern "C" struct HDC__ * __stdcall GetDC(struct HWND__ *)" (?GetDC@@$$J14YGPAUHDC__@@PAUHWND__@@@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2019: unresolved external symbol "extern "C" int __stdcall ReleaseDC(struct HWND__ *,struct HDC__ *)" (?ReleaseDC@@$$J18YGHPAUHWND__@@PAUHDC__@@@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2019: unresolved external symbol "extern "C" int __stdcall DeleteObject(void *)" (?DeleteObject@@$$J14YGHPAX@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2019: unresolved external symbol "extern "C" int __stdcall BitBlt(struct HDC__ *,int,int,int,int,struct HDC__ *,int,int,unsigned long)" (?BitBlt@@$$J236YGHPAUHDC__@@HHHH0HHK@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2019: unresolved external symbol "extern "C" void * __stdcall SelectObject(struct HDC__ *,void *)" (?SelectObject@@$$J18YGPAXPAUHDC__@@PAX@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2019: unresolved external symbol "extern "C" struct HBITMAP__ * __stdcall CreateCompatibleBitmap(struct HDC__ *,int,int)" (?CreateCompatibleBitmap@@$$J212YGPAUHBITMAP__@@PAUHDC__@@HH@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2019: unresolved external symbol "extern "C" struct HDC__ * __stdcall CreateCompatibleDC(struct HDC__ *)" (?CreateCompatibleDC@@$$J14YGPAUHDC__@@PAU1@@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2019: unresolved external symbol "extern "C" int __stdcall GetSystemMetrics(int)" (?GetSystemMetrics@@$$J14YGHH@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ) 1>screenshoter.obj : error LNK2019: unresolved external symbol "extern "C" struct HDC__ * __stdcall GetDC(struct HWND__ *)" (?GetDC@@$$J14YGPAUHDC__@@PAUHWND__@@@Z) referenced in function "private: void __clrcall screenshoter::Form1::gdiscreen(void)" (?gdiscreen@Form1@screenshoter@@$$FA$AAMXXZ)Note: That I've included all the files needed
I looked up in MSDN, but I couldn't really understand the error messeges. Moreover, I had encountered similar messages in the past, i solved it but adding a .lib file
This time I tried adding, however it didn't solve the problem
#pragma comment( lib, "GdiPlus.lib" )
解决方案Those functions are declared in gdi32.lib - not gdiplus.lib - and some might be in user32.lib.
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