使用::TransparentBlt(pDC->m_hDC, x, y,
bm.bmWidth,bm.bmHeight,
dcMem.m_hDC, 0, 0,
bm.bmWidth, bm.bmHeight, RGB(255, 0, 255));
时编译不能通过,错误如下:--------------------Configuration: saaa - Win32 Debug--------------------
Linking...
MyButton.obj : error LNK2001: unresolved external symbol __imp__TransparentBlt@44
Debug/saaa.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.saaa.exe - 2 error(s), 0 warning(s)很多时候我使用API函数都出现类似的错误,这到底是什么原因?
bm.bmWidth,bm.bmHeight,
dcMem.m_hDC, 0, 0,
bm.bmWidth, bm.bmHeight, RGB(255, 0, 255));
时编译不能通过,错误如下:--------------------Configuration: saaa - Win32 Debug--------------------
Linking...
MyButton.obj : error LNK2001: unresolved external symbol __imp__TransparentBlt@44
Debug/saaa.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.saaa.exe - 2 error(s), 0 warning(s)很多时候我使用API函数都出现类似的错误,这到底是什么原因?
你要包含头文件Wingdi.h 和 Windows.h.
然后 project\setting\link里面的ojbect&library modules加入 Gdi32.lib.
如果没有SDK,可以这样调用:
typedef BOOL (WINAPI *PTB)
(HDC, int,int,int,int,HDC, int, int,int,int,UINT);
PTB pTransparentBlt;
HMODULE hDLL = LoadLibrary ("Msimg32.dll");
pTransparentBlt = (PTB) GetProcAddress(hDLL,"TransparentBlt");
pTransparentBlt(pDC->m_hDC, x, y,
bm.bmWidth,bm.bmHeight,
dcMem.m_hDC, 0, 0,
bm.bmWidth, bm.bmHeight, RGB(255, 0, 255));