C++ 什么会导致我的C++；win32应用程序是否要在后台运行？
我已经在这个应用程序上工作了至少3-4个月，就在最近它还没有工作 今天就开始了，因为昨天天气很好，很平稳。 现在它运行了，但窗口不可见（我在任务管理器中检查了进程列表，它正在运行）。我已确保 显示窗口（hwnd、nFunsterStil）；不是意外删除的，但它仍然存在 我相信这个问题与WM_PAINT有关，因为当程序停止工作时，我正在处理这个问题 这就是我在编译它并开始不可见时所拥有的：C++ 什么会导致我的C++；win32应用程序是否要在后台运行？,c++,winapi,background,wm-paint,C++,Winapi,Background,Wm Paint,我已经在这个应用程序上工作了至少3-4个月，就在最近它还没有工作 今天就开始了，因为昨天天气很好，很平稳。 现在它运行了，但窗口不可见（我在任务管理器中检查了进程列表，它正在运行）。我已确保 显示窗口（hwnd、nFunsterStil）；不是意外删除的，但它仍然存在 我相信这个问题与WM_PAINT有关，因为当程序停止工作时，我正在处理这个问题 这就是我在编译它并开始不可见时所拥有的： PAINTSTRUCT ps; HDC hdc; case WM_PAINT: {
PAINTSTRUCT ps;
HDC hdc;
case WM_PAINT: {
hdc = BeginPaint(hwnd, &ps);
static RECT Background, Background2;
SetRect(&Background, 0, 0, 476, 555);
SetRect(&Background2, 300, 300, 200, 400);
FillRect(hdc, &Background, (HBRUSH) (INT_PTR)CreateSolidBrush(RGB(50,55,50)));
FillRect(hdc, &Background2, (HBRUSH) (INT_PTR)CreateSolidBrush(RGB(100,200,100)));
EndPaint(hwnd, &ps);
}
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) /* handle the messages */
{
case WM_CTLCOLORSTATIC: {
HDC hdcStatic = (HDC) wParam;
SetTextColor(hdcStatic, RGB(50,255,50));
SetBkColor(hdcStatic, RGB(0,0,0));
return (INT_PTR)CreateSolidBrush(RGB(0, 0, 0));
}
case WM_CTLCOLOREDIT: {
HDC hdcStatic = (HDC) wParam;
SetTextColor(hdcStatic, RGB(50,255,50));
SetBkColor(hdcStatic, RGB(0,0,0));
return (INT_PTR)CreateSolidBrush(RGB(0, 0, 0));
}
case WM_CREATE:
{
// ------------------MENU-------------------
HMENU hMenubar = CreateMenu();
HMENU hFile = CreatePopupMenu();
HMENU hCPP = CreatePopupMenu();
HMENU hHELP = CreatePopupMenu();
HMENU hCUSTOMIZE = CreatePopupMenu();
HMENU hTHEME = CreatePopupMenu();
HMENU hNEW = CreatePopupMenu();
AppendMenu(hFile, MF_STRING, ID_HOME, "Ho&me");
AppendMenu(hFile, MF_SEPARATOR, 0, 0);
AppendMenu(hFile, MF_POPUP, (UINT) hNEW, "N&ew...");
AppendMenu(hNEW, MF_STRING, ID_NEW, "Not&e");
AppendMenu(hFile, MF_STRING, ID_SAVE, "Sa&ve");
AppendMenu(hFile, MF_STRING, ID_SHOWCPP, "Ed&it");
AppendMenu(hFile, MF_SEPARATOR, 0, 0);
AppendMenu(hFile, MF_STRING, ID_CLOSE, "Cl&ose");
AppendMenu(hCPP, MF_STRING, ID_SHOWNOTES, "Li&st all notes");
AppendMenu(hCPP, MF_STRING, MENU_COREFILES, "Open 'Notes' fol&der");
AppendMenu(hCPP, MF_SEPARATOR, 0, 0);
AppendMenu(hCPP, MF_STRING, ID_SAVEFILE, "Sa&ve");
AppendMenu(hCPP, MF_STRING, ID_SHOWCPP, "Ed&it");
AppendMenu(hHELP, MF_STRING, 0, "Help Fil&es...");
AppendMenu(hHELP, MF_STRING, MENU_ABOUT, "Ab&out");
AppendMenu(hHELP, MF_SEPARATOR, 0, 0);
AppendMenu(hHELP, MF_STRING, 0, "Pro&duct Website");
AppendMenu(hCUSTOMIZE, MF_POPUP, (UINT) hTHEME, "Current& Theme");
AppendMenu(hTHEME, MF_STRING | MF_CHECKED, 0, "Pr&ompt");
AppendMenu(hTHEME, MF_STRING, 0, "No&te Pad");
AppendMenu(hMenubar, MF_STRING | MF_POPUP, (UINT) hFile, "Fi&le");
AppendMenu(hMenubar, MF_SEPARATOR, 0, 0);
AppendMenu(hMenubar, MF_SEPARATOR, 0, 0);
AppendMenu(hMenubar, MF_SEPARATOR, 0, 0);
AppendMenu(hMenubar, MF_STRING | MF_POPUP, (UINT) hCPP, "No&tes");
AppendMenu(hMenubar, MF_SEPARATOR, 0, 0);
AppendMenu(hMenubar, MF_SEPARATOR, 0, 0);
AppendMenu(hMenubar, MF_SEPARATOR, 0, 0);
AppendMenu(hMenubar, MF_STRING | MF_POPUP, (UINT) hHELP, "He&lp");
AppendMenu(hMenubar, MF_SEPARATOR, 0, 0);
AppendMenu(hMenubar, MF_SEPARATOR, 0, 0);
AppendMenu(hMenubar, MF_SEPARATOR, 0, 0);
AppendMenu(hMenubar, MF_STRING | MF_POPUP, (UINT) hCUSTOMIZE, "Custom&ise");
SetMenu(hwnd, hMenubar);
// WINDOW FEATURES!!!
TEST[1] = CreateWindow(TEXT("BUTTON"), TEXT("List all notes!"),
WS_VISIBLE | WS_CHILD | WS_BORDER,
200,375,150,25,
hwnd,(HMENU) ID_SHOWNOTES, NULL, NULL);
MAIN = CreateWindow(TEXT("edit"), TEXT(""),
WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT | ES_MULTILINE | ES_READONLY | SBS_RIGHTALIGN | WS_VSCROLL,
10,20,516,350,
hwnd,(HMENU) 5001, NULL, NULL);
EDIT = CreateWindow(TEXT("edit"), TEXT(""),
WS_VISIBLE | WS_CHILD | WS_BORDER | ES_LEFT | ES_MULTILINE | SBS_RIGHTALIGN | WS_VSCROLL,
10,20,516,350,
hwnd,(HMENU) 5001, NULL, NULL);
ShowWindow(EDIT, SW_HIDE);
NAME=CreateWindow(TEXT("edit"), TEXT("-> Title <-"),
WS_VISIBLE | WS_CHILD | WS_BORDER | ES_AUTOHSCROLL,
10, 0, 516, 20,
hwnd, (HMENU) ID_FILENAME, NULL, NULL);
ShowWindow(NAME, SW_HIDE);
TEST[2] = CreateWindow(TEXT("BUTTON"), TEXT("-> Home <-"),
WS_VISIBLE | WS_CHILD | WS_BORDER,
200,375,150,25,
hwnd,(HMENU) ID_SHOWHOME, NULL, NULL);
ShowWindow(TEST[2], SW_HIDE);
SetWindowText(MAIN, DEFTEXT);
break;
}
case WM_COMMAND: {
// MENU ITEMS!!!
//Close
if( LOWORD(wParam) == ID_CLOSE ) {
PostQuitMessage (0);
}
if(LOWORD(wParam) == MENU_COREFILES) {
ShellExecute(NULL, "explore", "Notes", NULL, NULL, SW_SHOW);
}
if(LOWORD(wParam) == MENU_ABOUT) {
MessageBox(hwnd, "© 2012 Joseph Meadows. \r\nThis program is essentially a reference guide for whatever you want. It can be used to store school notes, or things completely opposite.", "About:",
MB_ICONINFORMATION | MB_SYSTEMMODAL | MB_OK);
}
if(LOWORD(wParam) == ID_SHOWCPP) {
if(home==3) {
MessageBox(hwnd, "Error: 9026. Cannot edit Home Page.", "Invalid Action!",
MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFBUTTON1 | MB_OK);
}
else if(home==1) {
MessageBox(hwnd, "Error: 6502 Cannot edit System pages.", "Invalid Action!",
MB_ICONERROR | MB_SYSTEMMODAL | MB_DEFBUTTON1 | MB_OK);
}
else {
ShowWindow(EDIT, SW_SHOW);
ShowWindow(NAME, SW_SHOW);
ShowWindow(MAIN, SW_HIDE);
SetWindowText(StatButts[0],"List all notes!");
mode=2;
}
}
if(LOWORD(wParam) == ID_SAVE) {
char* tittle=SaveFile(hwnd, NAME, EDIT);
SetWindowText(MAIN, tittle);
ShowWindow(EDIT, SW_HIDE);
ShowWindow(NAME, SW_HIDE);
ShowWindow(MAIN, SW_SHOW);
mode=1;
}
if(LOWORD(wParam) == ID_HOME) {
if(mode==2){
int Savebox=MessageBox(hwnd, "Would you like to save this page?", "Save Page",
MB_ICONQUESTION | MB_SYSTEMMODAL | MB_DEFBUTTON1 | MB_YESNOCANCEL);
switch(Savebox){
case IDYES: {
ShowWindow(EDIT, SW_HIDE);
ShowWindow(NAME, SW_HIDE);
ShowWindow(MAIN, SW_SHOW);
SetWindowText(StatButts[0],"List all notes!");
int len = GetWindowTextLength(EDIT)+1;
static char title[1000];
GetWindowText(EDIT, title, len);
SetWindowText(MAIN, title);
mode=1;
home=1;
break;
}
case IDNO: {
ShowWindow(EDIT, SW_HIDE);
ShowWindow(NAME, SW_HIDE);
ShowWindow(MAIN, SW_SHOW);
SetWindowText(StatButts[0],"List all notes!");
SetWindowText(MAIN, DEFTEXT);
mode=1;
home=1;
}
case IDCANCEL: {}
}
}
if(mode==1){
ShowWindow(EDIT, SW_HIDE);
ShowWindow(NAME, SW_HIDE);
ShowWindow(MAIN, SW_SHOW);
SetWindowText(MAIN, DEFTEXT);
SetWindowText(StatButts[0],"List all notes!");
}
}
if(LOWORD(wParam)==ID_NEW) {
if(mode==1) {
ShowWindow(EDIT, SW_SHOW);
ShowWindow(NAME, SW_SHOW);
ShowWindow(MAIN, SW_HIDE);
SetWindowText(TEST[1],"List all notes!");
SetWindowText(EDIT, "");
mode=2;
}
}
if(LOWORD(wParam)==ID_SHOWHOME) {
if(mode==1) {
ShowWindow(MAIN, SW_SHOW);
ShowWindow(NAME, SW_HIDE);
ShowWindow(EDIT, SW_HIDE);
ShowWindow(TEST[1], SW_SHOW);
ShowWindow(TEST[2], SW_HIDE);
home=1;
SetWindowText(MAIN, DEFTEXT);
SetWindowText(TEST[1], "List all notes!");
}
if(mode!=1) {
int Savebox=MessageBox(hwnd, "Would you like to save this page?", "Save Page?",
MB_ICONQUESTION | MB_SYSTEMMODAL | MB_DEFBUTTON1 | MB_YESNOCANCEL);
switch(Savebox){
case IDYES: {
ShowWindow(EDIT, SW_HIDE);
ShowWindow(NAME, SW_HIDE);
ShowWindow(MAIN, SW_SHOW);
ShowWindow(TEST[1], SW_SHOW);
ShowWindow(TEST[2], SW_HIDE);
SetWindowText(TEST[1],"List all notes!");
int len = GetWindowTextLength(EDIT)+1;
static char title[1000];
GetWindowText(EDIT, title, len);
SetWindowText(MAIN, title);
mode=1;
home=1;
break;
}
case IDNO: {
ShowWindow(EDIT, SW_HIDE);
ShowWindow(NAME, SW_HIDE);
ShowWindow(MAIN, SW_SHOW);
ShowWindow(TEST[1], SW_SHOW);
ShowWindow(TEST[2], SW_HIDE);
SetWindowText(TEST[1],"List all notes!");
mode=1;
home=1;
}
}
}
}
if(LOWORD(wParam)==ID_SHOWNOTES) {
if(mode==1) {
std::string umm="";
ShowWindow(NAME,SW_SHOW);
ShowWindow(MAIN,SW_SHOW);
ShowWindow(EDIT,SW_HIDE);
ShowWindow(TEST[1], SW_HIDE);
ShowWindow(TEST[2], SW_SHOW);
SetWindowText(NAME, "-> Title <-");
WIN32_FIND_DATA File_Buffer;
HANDLE hFind = FindFirstFile(TEXT("Notes/*.NNF"), &File_Buffer);
PTSTR Files[8999];
int num=0;
SetWindowText(MAIN, "");
if(hFind != INVALID_HANDLE_VALUE) {
do {
PTSTR FileName = File_Buffer.cFileName;
Files[num] = FileName;
num=num+1;
string kkk(FileName);
stringstream nam(kkk);
string name;
getline(nam, name, '.');
umm = Stringadd(umm, name);
//================================================================================================
} while (FindNextFile(hFind, &File_Buffer));
std::stringstream out;
out << num;
std::string numb=out.str();
umm=umm+" \r\n \r\n "+"Number of Notes: "+numb;
const char * lol=umm.c_str();
SetWindowText(MAIN, lol);
FindClose(hFind);
}
}
if(mode!=1) {
int Savebox=MessageBox(hwnd, "Would you like to save this page?", "Save Page",
MB_ICONQUESTION | MB_SYSTEMMODAL | MB_DEFBUTTON1 | MB_YESNOCANCEL);
switch(Savebox){
case IDYES: {
ShowWindow(EDIT, SW_HIDE);
ShowWindow(NAME, SW_HIDE);
ShowWindow(MAIN, SW_SHOW);
ShowWindow(TEST[1], SW_SHOW);
ShowWindow(TEST[2], SW_HIDE);
SetWindowText(TEST[1],"List all notes!");
int len = GetWindowTextLength(EDIT)+1;
static char title[1000];
GetWindowText(EDIT, title, len);
SetWindowText(MAIN, title);
mode=1;
home=1;
break;
}
case IDNO: {
ShowWindow(EDIT, SW_HIDE);
ShowWindow(NAME, SW_HIDE);
ShowWindow(MAIN, SW_SHOW);
ShowWindow(TEST[1], SW_SHOW);
ShowWindow(TEST[2], SW_HIDE);
SetWindowText(TEST[1],"List all notes!");
mode=1;
home=1;
}
}
}
}
// BUTTONS!!!
//Show CPP
break;
}
case WM_PAINT: {
PAINTSTRUCT ps;
HDC hdc;
hdc = BeginPaint(hwnd, &ps);
static RECT Background;
SetRect(&Background, 0, 0, 476, 555);
FillRect(hdc, &Background, (HBRUSH) (INT_PTR)CreateSolidBrush(RGB(50,55,50)));
EndPaint(hwnd, &ps);
break;
}
case WM_DESTROY:
PostQuitMessage (0); /* send a WM_QUIT to the message queue */
default: /* for messages that we don't deal with */
break;
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
看起来您在案例末尾缺少了一个
中断中断WNDCLASSShowWindow（句柄，SW_SHOW/SW_HIDE）大概。确保此呼叫没有显示SW\u HIDE
考虑到您当前的帖子中没有显示您代码的这一部分，我可能会错，但这将是一个明智的选择
编辑：第55ish行，ShowWindow（）；将nFunsterStil更改为“SW_SHOW”，看看这是否解决了您的问题
@Joseph当您填写WNDCLASS
结构、注册并创建主窗口时，您将调用ShowWindow（handle，SW\u SHOW/SW\u HIDE）大概。确保此呼叫没有显示SW\u HIDE
考虑到您当前的帖子中没有显示您代码的这一部分，我可能会错，但这将是一个明智的选择
编辑：第55ish行，ShowWindow（）；将nFunsterStil更改为“SW_SHOW”，看看这是否解决了您的问题
@Joseph您应该进行调查以确定问题。然后——寻求解决方案
如果您正在创建一个标准的“重叠”窗口（即带有标题栏、系统菜单和最小/最大/关闭按钮）-以上所有内容都应由系统绘制，只有客户端区域（即窗口内部）在WM_PAINT
处理中绘制。因此，如果你在屏幕上什么也看不到，那么问题可能出在别处
MSVC中有一个很好的工具，叫做Spy++。使用它查找进程/线程，检查它是否确实创建了窗口，检查窗口样式和位置
您还可以在WM_PAINT
处理中添加断点。如果你的窗口确实存在并且可见，你就会到达那里
关于代码的一些注意事项：
无错误检查（例如测试BeginPaint
）的检索）。您如何知道您的窗口确实已创建（或至少其类已注册）？至少一些调试时宏（如断言）会有所帮助
如果您使用静态RECT
有什么原因？（在某些非常特殊的情况下，这可能会节省一些堆栈内存）
CreateSolidBrush
返回一个笔刷句柄，必须通过DeleteObject
释放该句柄。实际上你有一个资源泄漏
您应该进行调查以确定问题。然后——寻求解决方案
如果您正在创建一个标准的“重叠”窗口（即带有标题栏、系统菜单和最小/最大/关闭按钮）-以上所有内容都应由系统绘制，只有客户端区域（即窗口内部）在WM_PAINT
处理中绘制。因此，如果你在屏幕上什么也看不到，那么问题可能出在别处
MSVC中有一个很好的工具，叫做Spy++。使用它查找进程/线程，检查它是否确实创建了窗口，检查窗口样式和位置
您还可以在WM_PAINT
处理中添加断点。如果你的窗口确实存在并且可见，你就会到达那里
关于代码的一些注意事项：
无错误检查（例如测试BeginPaint
）的检索）。您如何知道您的窗口确实已创建（或至少其类已注册）？至少一些调试时宏（如断言）会有所帮助
如果您使用静态RECT
有什么原因？（在某些非常特殊的情况下，这可能会节省一些堆栈内存）
CreateSolidBrush
返回一个笔刷句柄，必须通过DeleteObject
释放该句柄。实际上你有一个资源泄漏
哦，我不得不调试窗口的次数从这里随机关闭了。@Joseph Meadows：给我们看一些开关的真实代码，这样我们至少可以看到问题是否存在。@Joseph Meadows：好的，至少我们知道，如果您没有放置中断
窗口，您的窗口将刚刚发布一条退出消息。因此问题不在于WM_PAINT？@Joseph Meadows:WM_PAINT有问题
，每当您被要求绘制窗口时，您都会发送一条消息退出应用程序。现在似乎还有其他问题，但代码太多，无法查看。试着缩小范围。哦，我不得不调试窗口的次数从这里随机关闭。@Joseph Meadows:给我们看一些开关的真实代码，这样我们至少可以看到问题是否存在。@Joseph Meadows:嗯，至少我们知道，如果您没有设置中断
窗口，您的窗口将刚刚发布一条退出消息。所以问题不在于WM_PAINT？@Joseph Meadows:WM_PAINT LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
/* Make the class name into a global variable */
char szClassName[ ] = "WindowsApp";
int WINAPI WinMain (HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nFunsterStil)
{
HWND hwnd, hwnd2; /* This is the handle for our window */
MSG messages; /* Here messages to the application are saved */
WNDCLASSEX wincl; /* Data structure for the windowclass */
/* The Window structure */
wincl.hInstance = hThisInstance;
wincl.lpszClassName = szClassName;
wincl.lpfnWndProc = WindowProcedure; /* This function is called by windows */
wincl.style = CS_DBLCLKS; /* Catch double-clicks */
wincl.cbSize = sizeof (WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
wincl.lpszMenuName = NULL; /* No menu */
wincl.cbClsExtra = 0; /* No extra bytes after the window class */
wincl.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default color as the background of the window */
wincl.hbrBackground = (HBRUSH) (INT_PTR)CreateSolidBrush(RGB(0,0,0));
/* Register the window class, and if it fails quit the program */
if (!RegisterClassEx (&wincl))
return 0;
/* The class is registered, let's create the program*/
hwnd = CreateWindowEx (
0, /* Extended possibilites for variation */
szClassName, /* Classname */
"VirtualNotes", /* Title Text */
WS_SYSMENU | WS_MINIMIZEBOX, /* default window */
CW_USEDEFAULT, /* Windows decides the position */
CW_USEDEFAULT, /* where the window ends up on the screen */
554, /* The programs width */
475, /* and height in pixels */
HWND_DESKTOP, /* The window is a child-window to desktop */
NULL, /* No menu */
hThisInstance, /* Program Instance handler */
NULL /* No Window Creation data */
);
/* Make the window visible on the screen */
ShowWindow (hwnd, nFunsterStil);
/* Run the message loop. It will run until GetMessage() returns 0 */
while (GetMessage (&messages, NULL, 0, 0))
{
/* Translate virtual-key messages into character messages */
TranslateMessage(&messages);
/* Send message to WindowProcedure */
DispatchMessage(&messages);
}
/* The program return-