我写了一个简短的程序来测试OpenClipboard函数。我从here复制了，看起来你不需要包含任何内容。我用记事本和命令提示符编程，所以我没有第三方程序告诉我什么是错的。错误消息只是代码片段中使用的所有内容都未在此范围内声明：
programm1.cpp: In function 'void toClipboard(const string&)':
programm1.cpp:65:17: error: 'OpenClipboard' was not declared in this scope
OpenClipboard(0);
^
programm1.cpp:66:17: error: 'EmptyClipboard' was not declared in this scope
EmptyClipboard();
^
programm1.cpp:67:2: error: 'HGLOBAL' was not declared in this scope
HGLOBAL hg=GlobalAlloc(GMEM_MOVEABLE,s.size());
^
programm1.cpp:67:10: error: expected ';' before 'hg'
HGLOBAL hg=GlobalAlloc(GMEM_MOVEABLE,s.size());
^
programm1.cpp:68:7: error: 'hg' was not declared in this scope
if (!hg){
^
programm1.cpp:69:18: error: 'CloseClipboard' was not declared in this scope
CloseClipboard();
^
programm1.cpp:72:20: error: 'hg' was not declared in this scope
memcpy(GlobalLock(hg),s.c_str(),s.size());
^
programm1.cpp:72:22: error: 'GlobalLock' was not declared in this scope
memcpy(GlobalLock(hg),s.c_str(),s.size());
^
programm1.cpp:72:42: error: 'memcpy' was not declared in this scope
memcpy(GlobalLock(hg),s.c_str(),s.size());
^
programm1.cpp:73:17: error: 'GlobalUnlock' was not declared in this scope
GlobalUnlock(hg);
^
programm1.cpp:74:19: error: 'CF_TEXT' was not declared in this scope
SetClipboardData(CF_TEXT,hg);
^
programm1.cpp:74:29: error: 'SetClipboardData' was not declared in this scope
SetClipboardData(CF_TEXT,hg);
^
programm1.cpp:75:17: error: 'CloseClipboard' was not declared in this scope
CloseClipboard();
^
programm1.cpp:76:15: error: 'GlobalFree' was not declared in this scope
GlobalFree(hg);
^