求解决一个win32显示窗口的问题

[sam132333]

我在VS6.0下用win32 application创建了一个工程，文件内容如下

#include <windows.h>
#include <stdio.h>

long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nShowCmd)
{
WNDCLASSEX stMyclass;
MSG stMsg; HWND hWindow;
//char* ClassName = "MyClass";
//char* CaptionName = "时钟";

// 注册窗口类
RtlZeroMemory(&stMyclass, sizeof(stMyclass));
stMyclass.cbSize = sizeof(stMyclass);
stMyclass.hInstance = hInstance;
stMyclass.hIcon = LoadIcon(0, IDI_APPLICATION);
stMyclass.hIconSm = LoadIcon(0, IDI_APPLICATION);
stMyclass.hCursor = LoadCursor(0, IDC_ARROW);
stMyclass.lpszClassName = "MyClass";
stMyclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
stMyclass.style = CS_HREDRAW | CS_VREDRAW;
stMyclass.lpfnWndProc = WinProc;
RegisterClassEx(&stMyclass);
// 创建窗口
hWindow = CreateWindowEx(WS_EX_CLIENTEDGE, "MyClass", "Clock",
WS_OVERLAPPEDWINDOW, 200, 200, 200, 200, NULL, NULL, hInstance, NULL);
ShowWindow(hWindow, SW_SHOWNORMAL);
UpdateWindow(hWindow);
// 消息循环
while (GetMessage(&stMsg, NULL, 0, 0))
{
TranslateMessage(&stMsg);
DispatchMessage(&stMsg);
}
return 0;
}

long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (uMsg == WM_CREATE)
{
MessageBox(hWnd, "创建窗口", "aaa", MB_OK);
}
else if (uMsg == WM_CLOSE)
{
PostQuitMessage(0);
DestroyWindow(hWnd);
}
else
DefWindowProc(hWnd, uMsg, wParam, lParam);

return 0;
}


编译一点问题没有，为啥运行后窗口就是不出来呢。。。

[sam132333]

CreateWindowEx返回的hWindow是0，有木有人说说呀

[nicklisir]

WM_CREATE返回0;你说，它还能出来吗?
WinProc设计有问题

[Eleven]

long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{ 
if (uMsg == WM_CREATE) 
{ 
MessageBox(hWnd, "创建窗口", "aaa", MB_OK); 
} 
else if (uMsg == WM_CLOSE) 
{ 
PostQuitMessage(0); 
DestroyWindow(hWnd); 
} 
return DefWindowProc(hWnd, uMsg, wParam, lParam);;
}

[sam132333]

[Quote=引用 2 楼 nicklisir 的回复:]

WM_CREATE返回0;你说，它还能出来吗?
WinProc设计有问题
[/Quote]

我问的就是为什么返回0，我用win32汇编写运行都是正常的

[sam132333]

[Quote=引用 3 楼 visualeleven 的回复:]

C/C++ code
long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (uMsg == WM_CREATE)
{
MessageBox(hWnd, "创建窗口", "aaa", MB_OK);
}
else if (uMsg == WM_CLOSE)
{
PostQuit……
[/Quote]

谢谢哈，明白了，改成这样子也可以，是吧O(∩_∩)O~

long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	if (uMsg == WM_CREATE)
	{
		MessageBox(hWnd, "创建窗口", "aaa", MB_OK);
	}
	else if (uMsg == WM_CLOSE)
	{
		PostQuitMessage(0);
		DestroyWindow(hWnd);
	}
	else
	{
		DefWindowProc(hWnd, uMsg, wParam, lParam);
		return 1;
	}

	return 0;
}

[sam132333]

[Quote=引用 3 楼 visualeleven 的回复:]

C/C++ code
long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (uMsg == WM_CREATE)
{
MessageBox(hWnd, "创建窗口", "aaa", MB_OK);
}
else if (uMsg == WM_CLOSE)
{
PostQuit……
[/Quote]

我觉得照你这么做某些消息是不是会被处理两遍，求解？

[gameslq]

long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{	
	if (uMsg == WM_CREATE)	
	{	
		MessageBox(hWnd, "创建窗口", "aaa", MB_OK);	
	}	
	else if (uMsg == WM_CLOSE)	
	{	
		PostQuitMessage(0);	
		DestroyWindow(hWnd);	
	}	
	else	
		return DefWindowProc(hWnd, uMsg, wParam, lParam); //改这一句增加 return 
	
	return 0;
}

调用 DefWindowProc 后不要再 reuturn 0,否则系统认为“无事可干”了。

[sam132333]

[Quote=引用 7 楼 gameslq 的回复:]

C/C++ code
long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (uMsg == WM_CREATE)
{
MessageBox(hWnd, "创建窗口", "aaa", MB_OK);
}
……
[/Quote]

呵呵，我的最终版本也是这么干的，谢谢了啊！

[sam132333]

[Quote=引用 7 楼 gameslq 的回复:]

C/C++ code
long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (uMsg == WM_CREATE)
{
MessageBox(hWnd, "创建窗口", "aaa", MB_OK);
}
……
[/Quote]

明白了，thank you

[振翅高飞]

把你的窗口过程函数的最后一个语句return 0;改成return DefWindowProc(hWnd, uMsg, wParam, lParam);

long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{ 
if (uMsg == WM_CREATE) 
{ 
MessageBox(hWnd, "创建窗口", "aaa", MB_OK); 
} 
else if (uMsg == WM_CLOSE) 
{ 
PostQuitMessage(0); 
DestroyWindow(hWnd); 
} 
else 
DefWindowProc(hWnd, uMsg, wParam, lParam);

return DefWindowProc(hWnd, uMsg, wParam, lParam);
}

改完后的全部代码为：

#include <windows.h>
#include <stdio.h>

long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(
HINSTANCE hInstance,  
HINSTANCE hPrevInstance,  
LPSTR lpCmdLine,  
int nShowCmd)
{ 
WNDCLASSEX stMyclass; 
MSG stMsg; HWND hWindow;  
//char* ClassName = "MyClass"; 
//char* CaptionName = "时钟";

// 注册窗口类 
RtlZeroMemory(&stMyclass, sizeof(stMyclass)); 
stMyclass.cbSize = sizeof(stMyclass); 
stMyclass.hInstance = hInstance; 
stMyclass.hIcon = LoadIcon(0, IDI_APPLICATION); 
stMyclass.hIconSm = LoadIcon(0, IDI_APPLICATION); 
stMyclass.hCursor = LoadCursor(0, IDC_ARROW); 
stMyclass.lpszClassName = "MyClass"; 
stMyclass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH); 
stMyclass.style = CS_HREDRAW | CS_VREDRAW; 
stMyclass.lpfnWndProc = WinProc; 
RegisterClassEx(&stMyclass); 
// 创建窗口 
hWindow = CreateWindowEx(WS_EX_CLIENTEDGE, "MyClass", "Clock",  
WS_OVERLAPPEDWINDOW, 200, 200, 200, 200, NULL, NULL, hInstance, NULL); 
ShowWindow(hWindow, SW_SHOWNORMAL); 
UpdateWindow(hWindow);
// 消息循环 
while (GetMessage(&stMsg, NULL, 0, 0)) 
{ 
TranslateMessage(&stMsg); 
DispatchMessage(&stMsg); 
}
return 0;
}

long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{ 
if (uMsg == WM_CREATE) 
{ 
MessageBox(hWnd, "创建窗口", "aaa", MB_OK); 
} 
else if (uMsg == WM_CLOSE) 
{ 
PostQuitMessage(0); 
DestroyWindow(hWnd); 
} 
else 
DefWindowProc(hWnd, uMsg, wParam, lParam);

return DefWindowProc(hWnd, uMsg, wParam, lParam);
}

记得把分给我。

[sam132333]

[Quote=引用 10 楼 sunyongliang118 的回复:]

把你的窗口过程函数的最后一个语句return 0;改成return DefWindowProc(hWnd, uMsg, wParam, lParam);
C/C++ code

long CALLBACK WinProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
if (uMsg == WM_CREATE)
{
Mess……
[/Quote]

谢谢你的回答，但分已经给3L的兄弟了，不好意思O(∩_∩)O~