📄 bcb 编写 dll 终极手册.htm
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<p class=MsoNormal align=center style='text-align:center;mso-pagination:widow-orphan'><b><span
lang=EN-US style='font-size:12.0pt;font-family:宋体;mso-bidi-font-family:宋体;
mso-font-kerning:0pt'>BCB </span></b><b><span style='font-size:12.0pt;
font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:0pt'>编写<span
lang=EN-US> DLL </span>终极手册</span></b><span lang=EN-US style='font-size:9.0pt;
font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:0pt'><o:p></o:p></span></p>
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style='font-size:9.0pt;font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:
0pt'>【文章出处：转载】<span lang=EN-US> </span>【作者：未知】<span lang=EN-US> </span>【发布时间：<span
lang=EN-US>2005-01-25</span>】<span lang=EN-US> </span>【查看： <span
lang=EN-US><script language="JavaScript" src="/php/count.php?artID=10756&view=yes">
</script>19</span>次】 <span lang=EN-US><o:p></o:p></span></span></p>
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font-family:宋体;mso-bidi-font-family:宋体;mso-font-kerning:0pt'><o:p> </o:p></span></p>
<p class=MsoNormal align=left style='text-align:left;line-height:15.0pt;
mso-pagination:widow-orphan'><span style='font-size:10.0pt;font-family:宋体;
mso-bidi-font-family:宋体;mso-font-kerning:0pt'>由于现在比较多的网友老是在<span lang=EN-US>
CSDN </span>上询问关于<span lang=EN-US> BCB </span>编写<span lang=EN-US> DLL </span>的问题，我编写了这篇文章抛砖引玉<span
lang=EN-US> <br>
<br>
</span>一<span lang=EN-US>. </span>编写<span lang=EN-US> DLL <br>
File/New/Dll </span>生成<span lang=EN-US> Dll </span>的向导，然后可以添加导出函数和导出类<span
lang=EN-US> <br>
</span>导出函数：<span lang=EN-US>extern "C" __declspec(dllexport)
ExportType FunctionName(Parameter) <br>
</span>导出类：<span lang=EN-US>class __declspec(dllexport) ExportType
ClassName{...} <br>
</span>例子：<span lang=EN-US>(</span>说明：只是生成了一个<span lang=EN-US> DLL.dll ) <br>
<br>
#include "DllForm.h" // TDllFrm </span>定义<span lang=EN-US> <br>
<br>
USERES("Dll.res"); <br>
USEFORM("DllForm.cpp", DllFrm); <br>
<br>
class __declspec(dllexport) __stdcall MyDllClass { //</span>导出类<span
lang=EN-US> <br>
</span> <span lang=EN-US>public: <br>
</span> <span lang=EN-US> MyDllClass(); <br>
</span> <span lang=EN-US> void CreateAForm(); <br>
</span> <span lang=EN-US> TDllFrm* DllMyForm; <br>
}; <br>
<br>
TDllFrm* DllMyForm2; <br>
extern "C" __declspec(dllexport) __stdcall void CreateFromFunct();//</span>导出函数<span
lang=EN-US> <br>
<br>
//---------------------------------------------------------------------------
<br>
int WINAPI DllEntryPoint(HINSTANCE hinst, unsigned long reason, void*) <br>
{ <br>
</span> <span lang=EN-US>return 1; <br>
} <br>
//---------------------------------------------------------------------------
<br>
<br>
MyDllClass::MyDllClass() <br>
{ <br>
} <br>
<br>
void MyDllClass::CreateAForm() <br>
{ <br>
</span> <span lang=EN-US>DllMyForm = new TDllFrm(Application); <br>
</span> <span lang=EN-US>DllMyForm->Show(); <br>
} <br>
//---------------------------------------------------------------------------
<br>
void __stdcall CreateFromFunct() <br>
{ <br>
</span> <span lang=EN-US>DllMyForm2 = new TDllFrm(Application); <br>
</span> <span lang=EN-US>DllMyForm2->Show(); <br>
} <br>
<br>
<br>
</span>二<span lang=EN-US>. </span>静态调用<span lang=EN-US> DLL <br>
</span>使用<span lang=EN-US> $BCB path\Bin\implib.exe </span>生成<span
lang=EN-US> Lib </span>文件，加入到工程文件中<span lang=EN-US> <br>
</span>将该文件拷贝到当前目录，使用<span lang=EN-US> implib MyDll.lib MyDll.dll </span>生成<span
lang=EN-US> <br>
// Unit1.h // TForm1 </span>定义<span lang=EN-US> <br>
#include "DllForm.h" // TDllFrm </span>定义<span lang=EN-US> <br>
//---------------------------------------------------------------------------
<br>
<br>
__declspec(dllimport) class __stdcall MyDllClass { <br>
</span> <span lang=EN-US>public: <br>
</span> <span lang=EN-US>MyDllClass(); <br>
</span> <span lang=EN-US>void CreateAForm(); <br>
</span> <span lang=EN-US>TDllFrm* DllMyForm; <br>
}; <br>
extern "C" __declspec(dllimport) __stdcall void CreateFromFunct(); <br>
<br>
class TForm1 : public TForm{...} <br>
<br>
<br>
// Unit1.cpp // TForm1 </span>实现<span lang=EN-US> <br>
void __fastcall TForm1::Button1Click(TObject *Sender) <br>
{ // </span>导出类实现，导出类只能使用静态方式调用<span lang=EN-US> <br>
</span> <span lang=EN-US>DllClass = new MyDllClass(); <br>
</span> <span lang=EN-US>DllClass->CreateAForm();</span> <span lang=EN-US>
<br>
} <br>
//---------------------------------------------------------------------------
<br>
void __fastcall TForm1::Button2Click(TObject *Sender) <br>
{ // </span>导出函数实现<span lang=EN-US> <br>
</span> <span lang=EN-US>CreateFromFunct(); <br>
} <br>
//---------------------------------------------------------------------------
<br>
<br>
void __fastcall TForm1::FormClose(TObject *Sender, TCloseAction &Action) <br>
{ <br>
</span> <span lang=EN-US>delete DllClass; <br>
} <br>
<br>
</span>三<span lang=EN-US>. </span>动态调用<span lang=EN-US> DLL <br>
// Unit1.h <br>
class TForm1 : public TForm <br>
{ <br>
... <br>
private: // User declarations <br>
void (__stdcall *CreateFromFunct)(); <br>
... <br>
} <br>
<br>
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