Question

怎样用c语言做个最简单的软件界面来呢？看看这段代码

#include <windows.h>

int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPreInstance,
LPSTR lpCmdLine,
int nShowCmd)
{
MessageBox(NULL,"WinMain创建的窗口程序","WinMain",MB_OK);
return 0;
}

Answer 1

//用windows最基本的api写的，还有很多方法可以做界面
#include<windows.h>
LRESULT CALLBACK WndProc(HWND ,UINT ,WPARAM ,LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd )
{
WNDCLASS wndclass;
static TCHAR szClassname[]=TEXT("weigua");
MSG msg;
HWND hwnd;
wndclass.cbClsExtra=0;
wndclass.cbWndExtra=0;
wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.hCursor=LoadCursor(NULL,IDC_CROSS);
wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
wndclass.hInstance=hInstance;
wndclass.lpfnWndProc=WndProc;
wndclass.lpszClassName=szClassname;
wndclass.lpszMenuName=NULL;
wndclass.style=CS_HREDRAW|CS_VREDRAW;
if(!RegisterClass(&wndclass))
{
MessageBox(NULL,TEXT("RegisterClass!"),TEXT("ERROR"),MB_ICONERROR);
return 0;
}
hwnd=CreateWindow(szClassname,TEXT("Fu"),WS_OVERLAPPEDWINDOW,0,0,200,200,NULL,NULL,hInstance,NULL);
UpdateWindow(hwnd);
ShowWindow(hwnd,nShowCmd);
while(GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
switch(message)
{
case WM_CREATE:
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd,message,wParam,lParam);
}

Answer 2

要成功弹出这个对话框，关键问题是能不能调用MessageBox()这个函数，跟你在哪儿调用它没关系，只要你是win系统 并且包含了 <windows.h>头文件就可以，所以主函数用main()也可以。

Answer 3

#include <Windows.h>

int main() {
MessageBoxA(NULL, "和main有啥区别？“， "呵呵", MB_OK);
}