[DLL]Delphi 动态调用DLL代码

静态调用往往不够灵活和影响性能，采取动态调用是上上之选。

不废话上通用代码。

	procedure TForm1.btn12Click(Sender: TObject);
	type
	TIntFunc = function(n: Integer): Extended; stdcall;
	var
	Th: Thandle;
    Tf: TIntFunc;
	Tp: TFarProc;
	begin
	Th := LoadLibrary('dll.dll'); { 装载DLL }
	if Th > 0 then
	try
	Tp := GetProcAddress(Th, PChar('addone'));
	if Tp <> nil then
	begin
	Tf := TIntFunc(Tp);
	 ShowMessage(FormatFloat('', Tf(1)));
	 end
	else
	ShowMessage('addone函数没有找到');
	finally
	FreeLibrary(Th); { 释放DLL }
	end
	else
	ShowMessage('dll.dll没有找到');
	end;