我在网上下载了一个多线程例子,主程序如下。
单步跟踪发现,执行到setupform.ShowModal时就提示下面错误:
Exception EAccessViolation in module SimElavotor.exe at 0006B003.
Access violation at address 0046B003 in module 'SimElavotor.exe'. Read of address 00000000.
请问为什么会出现这种错误,如何解决?program SimElavotor;uses
Forms,
Setupin in 'Setupin.pas' {setupForm},
main in 'main.pas' {mainform},
Define in 'Define.pas';{$R *.res}
begin
Application.Initialize;
setupform.ShowModal;
Application.CreateForm(Tmainform, mainform);
Application.Run;
end.
单步跟踪发现,执行到setupform.ShowModal时就提示下面错误:
Exception EAccessViolation in module SimElavotor.exe at 0006B003.
Access violation at address 0046B003 in module 'SimElavotor.exe'. Read of address 00000000.
请问为什么会出现这种错误,如何解决?program SimElavotor;uses
Forms,
Setupin in 'Setupin.pas' {setupForm},
main in 'main.pas' {mainform},
Define in 'Define.pas';{$R *.res}
begin
Application.Initialize;
setupform.ShowModal;
Application.CreateForm(Tmainform, mainform);
Application.Run;
end.
Application.Initialize;
Application.CreateForm(Tmainform, mainform);
Application.CreateForm(Tsetupform,setupform)
setupform.ShowModal;Application.Run;
Application.CreateForm(TFrm_Index, Frm_Index);先加载再调用就可以了。